SVS SB-1000 Pro vs Klipsch R-120SW

These two get recommended together constantly, and on paper they look like the same purchase: a 12 in driver, a class D plate amplifier, a similar price bracket. They are not the same purchase. One is a small sealed box with a published measurement condition and a DSP app; the other is a substantially larger rear-ported box with a louder published SPL and a specification sheet that leaves out the number you need to set it up.

The published numbers, side by side

SVS SB-1000 Pro product page and Klipsch R-120SW spec sheet (PDF).

The 9 Hz nobody should buy on

SVS says 20 Hz. Klipsch says 29 Hz. That looks like the whole comparison and it is the least safe number in it, because only one of the two tells you how it was obtained. SVS's figure carries its condition: 2 m ground plane, away from reflective structures, which is a quasi-anechoic measurement. Klipsch's 29 Hz ±3 dB carries nothing. A figure measured close to boundaries and a figure measured away from them are not the same kind of figure, and without the condition you cannot tell which you are reading.

That is not an accusation — Klipsch may well have measured it the same way. It is the point that our home theater subwoofer roundup ranks on: SVS is the only manufacturer in the group we cover that publishes a measurement condition at all, and a number you can audit is worth more than a number that is 9 Hz lower and cannot be.

The 120 Hz ceiling, which is the real split

Look at the top of the published range instead of the bottom. SVS publishes up to 270 Hz. Klipsch publishes up to 120 Hz. For a 5.1 system fed an LFE channel that ceiling is irrelevant — LFE is band-limited well below it. For anyone integrating a subwoofer with small main speakers it is the number that decides the job, because the handover has to happen where the main speakers actually stop.

Whether your amplifier can connect to it at all

This is the one that sends subwoofers back. The Klipsch R-120SW spec sheet lists line level / LFE RCA jacks only — no speaker-level inputs. If your amplifier is an AV receiver that is a non-issue, because a receiver always has a subwoofer output. If it is a two-channel integrated amplifier, many of which have no subwoofer output at all, the R-120SW cannot be connected without adding something — and the SB-1000 Pro can, because SVS publishes a speaker-level stereo input and even states its impedance at 1 kΩ alongside the 16 kΩ line input.

Published input impedances are rarer than they should be in this category, and they are the difference between knowing a connection is appropriate and hoping. It is also why the R-120SW is our second pick for a film room and is not in the picks at all on the subwoofer roundup written for a stereo amplifier.

Sealed and small, or ported and large

The enclosure difference is real and it is mostly a room decision rather than a quality one. The Klipsch cabinet is 19.2 in deep against the SVS's 14.76 in, and its port fires backwards, so it needs clearance behind it that the sealed SVS does not. Neither maker publishes a recommended wall clearance or a port tuning frequency, which means nobody can tell you how much space is enough — a rear port in a tight corner is the one placement this comparison would actually warn you off, and the reasoning is on our subwoofer placement page.

Against that, the bigger box is published louder. Klipsch states a 116 dB maximum acoustic output; SVS publishes no maximum SPL figure for the SB-1000 Pro at all, so this is one comparison where the Klipsch has the number and the SVS has the gap. In a large open-plan film room that is a genuine argument for the Klipsch, and we are not going to pretend otherwise because the sealed box wins the rest of the sheet. The category argument — what sealed and ported actually trade against each other — is on our ported versus sealed page, and cabinet size against extension is worked through on what size subwoofer you need.

Power ratings that are not the same rating

SVS publishes 325 W RMS continuous with an 820+ W peak figure beside it. Klipsch publishes 200 W continuous and 400 W peak, and the 400 W is the number that appears in retail listings. Compare continuous to continuous and the gap is 325 W against 200 W; compare the peaks and it is 820 W against 400 W. Either way the SVS is the bigger amplifier, but the reason to read the pair carefully is that these two makers label the figures differently, and a listing quoting “400 W” against “325 W” inverts the comparison. The same trick appears throughout this category and we take it apart on how to read an amplifier power rating.

SVS also publishes a 13.3 mm Xmax and 26.9 mm Xmechfor its driver, which is the specification that tells you how much linear excursion the motor actually has. Klipsch publishes “12 in high-excursion spun-copper IMG woofer” and no excursion figure. “High-excursion” is a description; 13.3 mm is a number.

What the SVS gives you that is not on the spec sheet

The SB-1000 Pro's DSP is published as a 50 MHz Analog Devices part driving a Bluetooth app with three nameable presets, three parametric EQ bands per preset, and adjustable low-pass, phase, polarity and room-gain compensation. Three EQ bands will not fix a room mode — nothing on a subwoofer's back panel will — but they let you pull down the single loudest peak, which is usually the complaint people describe as “boomy”. The Klipsch gives you volume, low-pass, a 0/180 phase switch and auto power-on, which is the conventional set and is also the set that cannot be saved, recalled or read off a screen.

Both are easier to get right once the subwoofer is in a sensible place, and placement is worth more than either amplifier or either app. If the room still booms after you have moved it, the next purchase is corner absorption rather than a different subwoofer — and we have reviewed the panel most people buy first, including why its NRC rating tells you nothing about the band a subwoofer lives in.

Which one to buy

Choose the SVS SB-1000 Pro if your room is small or your listening is two-channel, if your amplifier might not have a subwoofer output, if your main speakers are bookshelf-sized and you want the handover set to a number you can see, or if you simply prefer buying from the one maker in this category that prints its measurement conditions. It is also the smaller box by a wide margin, which matters more in practice than most people expect.

Choose the Klipsch R-120SW if the room is large, the use is film, the receiver has a subwoofer output, and you want the published 116 dB maximum output and the bigger cabinet for the money. Give the rear port room to breathe, and accept that you are setting the low-pass by ear because the range is not published.

Both are in our picks for a reason, and the full six-way ranking — including the two sealed alternatives and the one subwoofer in the group that publishes a 50 Hz low-pass floor — is on the best subwoofers for a home theater.