STEREO GUIDE verdict
The Sony ULT Tower 7 impresses with powerful deep bass, pleasantly rounded mids and highs, and good sound dispersion thanks to additional rear tweeters. An app, light show, and a range of connections—including XLR and USB-C audio—round out its features. However, the rich bass comes at the expense of clarity, and the 22.8-kilo speaker is not very easy to move, even with its casters. The more compact ULT Tower 5 offers a surprisingly similar sound; JBL stands out with its convenient trolley design and replaceable battery.
Pros
- Deep, rich bass
- Pleasantly balanced sound in the mids and highs
- Comprehensive app with 10-band EQ and versatile connectivity
- Good sound distribution thanks to rear-facing tweeters
Cons
- Heavy bass overpowers the midrange and compromises clarity
- At very high volume levels, especially in ULT 2, the mids sound harsher
- Heavy weight and insufficient rear grip when pulling on wheels
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Tonal balance / transparency8.7
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Bass / Dynamics9.6
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Usability / Conncetivity9.2
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Price/Performance9.2
With three-way technology, rear-facing tweeters, and up to 30 hours of battery life, the Sony ULT Tower 7 builds on the concept of the smaller Tower 5. In listening and hands-on tests, this party speaker impresses with powerful bass and wide sound dispersion. However, its weight and less-than-convincing maneuverability on casters limit its portability.
After the Sony ULT Tower 5, the bar was set high for its bigger brother. Even the entry-level model of the new ULT Tower series delivers a bass foundation that you’d hardly expect given its dimensions. The Tower 7 takes it a step further in terms of enclosure volume, driver configuration, and amplifier power. We put them head-to-head to see if this translates to a correspondingly significant improvement in sound quality.
For 600 euros, Sony packs in a 28-cm woofer, two separate midrange drivers, and four tweeters. It also features a light show, karaoke, a versatile app, and connections that allow the speaker to be integrated into a DJ setup. The features pique your curiosity. When transporting it, the first thing you notice is its weight: 22.8 kilograms.
Design and Usability: A Tower with a Distinctive Look
The distinctive design is one of the strengths of the new Sony series. The clearly structured front panel, with its wraparound light frame, has a modern look and is highly recognizable. The large, illuminated ULT symbol in the upper corner of the case adds a distinctive touch while also serving a practical purpose.
Pressing the ULT button—which is conveniently positioned for both upright and horizontal use—switches the sound mode, while the rotating ring adjusts the volume. This combination is easy to use at a party. You can configure which sound profiles the button cycles through in the Sony Sound Connect app. In addition to FLAT, ULT 1, and ULT 2, LIVE is also available.
Like the smaller tower, the 7 Series can be used either upright or lying on its side. The electronics adjust the sound settings based on the speaker’s orientation. However, IPX4 splash protection applies only when the speaker is positioned upright and the port cover is fully closed. This is an important distinction for garden use.
Three channels and seven drivers for the dance floor
The biggest technical difference from the Tower 5 is found behind the front panel. There, a 28-centimeter woofer handles the bass. Two 12-cm midrange drivers handle vocals and instruments above the bass range. In the smaller model, its 23-cm low-midrange driver must handle both tasks.
In addition to the two front tweeters, the Tower 7 features two more tweeters on the back. The drivers, housed in waveguides, are designed to disperse high frequencies more widely and reach guests even behind the speaker. Sony refers to this as “360° Party Sound.” Overall, the larger Tower thus functions as a three-way system with seven drivers.
The bass reflex port is called the ULT DUCT. Sony has designed it for high airflow and minimal airflow turbulence. The manufacturer specifies the amplifier power as up to 420 watts. This figure is not listed on the product page as RMS continuous power.
The sound distribution proves to be effective in the listening test. The additional tweeters are particularly useful when guests are standing around the speaker or moving around on the dance floor. More people can hear the higher frequencies. The extra technical effort pays off here in a very tangible way.
Connections: From smartphones to DJ consoles
The Tower 7 offers significantly more features than just Bluetooth playback. Its connection panel is hidden under a flap on the back and is identical to that of the smaller ULT Tower 5. The Partybox accepts analog music signals via a stereo RCA input. An XLR input allows for a balanced connection to compatible mixing consoles. An XLR output can route the signal to additional speakers.
USB-C transmits digital audio from a compatible smartphone or computer. USB-A is used to play music from a flash drive and can charge a mobile device. A 6.3-mm jack is available for a dynamic microphone. Microphone level, echo, and tone can be adjusted directly on the device.
Bluetooth 5.3 supports SBC, AAC, and LDAC. Multipoint allows connection to two audio sources. Two Tower 7 speakers can be operated wirelessly as a stereo pair. Party Chain uses Auracast to synchronize music and lighting across up to 100 compatible Sony speakers.
The Sony Sound Connect app combines sound and lighting controls with party and karaoke features. The 10-band equalizer is particularly useful. Given the powerful bass tuning, it allows you to fine-tune the low frequencies to better suit the room. It also includes the BEAT, WAVE, and MELLOW lighting programs, as well as additional settings for party mode. An automatic sound field optimization feature is designed to adjust the sound to the surrounding environment.
Mobility: Wheels alone don’t make a trolley
Measuring 42.1 centimeters wide, 71 centimeters tall, and 34.7 centimeters deep, the Tower 7 is an impressive piece of party equipment. At 22.8 kilograms, it weighs a good ten kilos more than the Tower 5. Four recessed side handles make it easier to lift and load. Still, you’ll want some help when carrying it over longer distances.
To that end, Sony has equipped the 7 with wheels on the back. There is also a small recessed handle on the upper back panel for pulling. The recesses on the sides are primarily for lifting and carrying.
Unfortunately, the rear handle is also positioned too low for comfortable pulling. If you tilt the tower onto its casters, the handle drops even lower. In our hands-on test, we had to bend down to move the heavy box. You quickly find yourself wishing for a pull-out handle; the side recesses also don’t offer a comfortable alternative when rolling.
The JBL PartyBox Stage 320 demonstrates just how easy it is to move a heavy party speaker, thanks to its telescoping handle and larger wheels with greater ground clearance. The handle brings your hand to a comfortable height, and the speaker can be pulled along like a suitcase. Despite its wheels, the Sony remains a heavy piece of luggage.
Battery life: 30 hours under ideal conditions
Sony claims up to 30 hours of playback for the Tower 7. The user manual explains in pleasing detail the conditions under which this figure is achieved: Bluetooth connection, ULT 1 or ULT 2, volume level 17 out of 50, and the lights turned off. In practice, even at “full blast” with the light show on, you can still get four to five hours of playtime. That’s better than most competitors.
With the lights on, Sony estimates a runtime of about 15 hours at the same volume. According to the manual, the battery lasts about three hours at maximum volume with the lights on. The 30-hour runtime is therefore hardly applicable to a loud party night with a full light show. All runtime figures are manufacturer estimates.
A full charge should take about three hours when the device is turned off. Ten minutes of fast charging should provide enough power for another three hours of music under the moderate playback conditions described. STAMINA conserves energy by disabling light and sound effects.
When it comes to replacing the battery, comparing it to the JBL model is complicated, and it can’t be done quickly without tools. Sony describes a built-in lithium-ion battery and advises users to contact support or a retailer if the battery’s capacity declines significantly. The manual does not explain how the user can replace it quickly. With the Stage 320, on the other hand, the battery is located in a compartment on the back that’s accessible without tools and can be pulled out using a strap. A separately available, pre-charged replacement battery can be installed in just a few simple steps, even by those with no technical expertise. This allows the party to continue away from a power outlet with only a brief interruption. This puts Sony’s advantage of slightly longer battery life into perspective.
Sony ULT Tower 7 Audio Review: More Volume, Familiar Sound
In terms of sound, the larger Sony model is surprisingly close to the Tower 5. The larger woofer and the additional cabinet volume are most noticeable in the slightly richer bass. The bass gains in volume, but its quality hardly stands out from that of the smaller model. Even the Tower 5 had a lot to offer in this area.
Even with the 7-series, FLAT is the most sensible starting point for many rooms. Even without additional ULT boost, the bass foundation can come across as almost too rich. This impression is further amplified near a wall or even in a corner of the room. Maintaining a distance from surrounding surfaces and applying targeted equalization help to integrate the powerful low-frequency richness into the room.
ULT 1 boosts the deep bass. ULT 2 further enhances the physical impact, turning the speaker into a truly powerful party machine. But the extra bass emphasis comes at a price: at very high volumes and with bass-heavy music, even the large tower speaker has to protect its woofer. The bass no longer keeps pace, while the mids become somewhat harsh. The pleasantly rounded sound signature loses some of its smoothness.
The more complex three-way design therefore does not give the 7-series as clear an advantage at high volumes as its larger size might initially suggest. In a practical listening comparison, the Tower 5 remains surprisingly close in terms of sound stability and bass impact.
Especially when using the two-stage ULT Boost, you’ll want a party room that can keep up. This is particularly true for ULT 1, which boosts the lowest octaves so much that the party speaker sometimes seems to choke on the bass at higher volumes. The risk of standing waves and the resulting rumbling also makes placement a crucial factor in achieving clean bass reproduction. In this regard, the larger tower is even more demanding than the ULT Tower 5, which was tested under the same conditions in a large basement with solid walls.
Sony vs. JBL: Round and Powerful or Clear and Direct
At normal to high volume levels, the Sony’s mids and highs sound pleasantly rounded. Vocals are less in-your-face than on the JBL PartyBox Stage 320, and the high frequencies blend harmoniously into the soundscape. This sound signature can be particularly pleasant during longer listening sessions.
However, a certain muddiness remains audible. The enormous bass presence overshadows the midrange and robs the soundstage of transparency. It’s not as easy to distinguish between voices and instruments as one would hope from a larger three-way model.
In a direct comparison, the Stage 320 sounds a bit harsher, but it opens up the soundstage more clearly. It comes across as clearer and more transparent. The Sony counters with a deeper, more voluminous bass foundation and a more pleasant sound signature above the low frequencies. As a result, the two speakers have different priorities.
The Tower 7 offers a compelling advantage in sound distribution. The rear tweeters expand the area where the music retains its brilliance. On a dance floor, more guests benefit from this than with a speaker whose high frequencies are directed exclusively forward.
Conclusion and Alternatives: The smaller Sony gives the big one a run for its money
The Sony ULT Tower 7 combines a very successful, distinctive design with versatile connectivity options, a feature-rich app, and good sound distribution. Its deep, full-bodied bass creates a great party atmosphere. The pleasantly rounded mids and highs are less harsh than those of its direct JBL competitor.
However, the rich bass response masks some of the midrange and compromises clarity. The JBL PartyBox Stage 320 delivers a clearer, more open sound, though it can also come across as slightly harsher. When it comes to portability, JBL’s Party Trolley is in a league of its own. Its quick-swap battery offers another practical advantage for parties without access to a power outlet.
The Sony’s less-than-convincing portability somewhat dampens the enjoyment of its beautiful design. Its strongest competitor also comes from within the same company: The ULT Tower 5 is more portable and delivers similar volume stability as well as bass that’s hardly any less impressive. Those who opt for the 7 series primarily for the additional sound dispersion and the longer rated battery life will get understandable extras. However, for the sound quality improvement alone, the 200-euro premium and a good ten additional kilograms are a considerable price to pay.
You can find more options in our list of the best Bluetooth speakers
Technical Specifications: Sony ULT Tower 7
- Manufacturer’s Suggested Retail Price: 600 Euro
- Dimensions (W x H x D): 42.1 × 71 × 34.7 cm
- Battery life: Up to 30 hours without the light; about 15 hours with the light on
- Charging: About 3 hours for a full charge when the device is turned off; 10-minute quick charge for up to 3 hours of playback
- Weight: 22.8 kg
- Color: Black
- Special Features: Bluetooth 5.3; SBC, AAC, LDAC; Multipoint, analog inputs (RCA input, XLR input, XLR output, USB-A, USB-C audio, 6.3-mm microphone input), Stereo pairing, Party Mode via Auracast, app control, LED party light, PX4 when positioned vertically
- For more information, visit: www.sony.de
