Difference between revisions of "Sub1/Sub2"
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== Comparing Power Stands to Subs == | == Comparing Power Stands to Subs == | ||
| − | === L1 Pro8 Power Stand compared to Sub1 | + | === L1 Pro8 Power Stand compared to Sub1 === |
Both use the 7"x13" Racetrack transducer | Both use the 7"x13" Racetrack transducer | ||
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The L1 Pro8 goes down to 45 Hz (-3 dB). The Sub1 goes down to 40 Hz (-3 dB). | The L1 Pro8 goes down to 45 Hz (-3 dB). The Sub1 goes down to 40 Hz (-3 dB). | ||
| − | === L1 Pro16 Power Stand compared to Sub2 | + | === L1 Pro16 Power Stand compared to Sub2 === |
Both use the 10"x18" Racetrack transducer | Both use the 10"x18" Racetrack transducer | ||
| Line 176: | Line 176: | ||
The L1 Pro16 bass amp is 1000 watts RMS. The Sub2 is 1000 watts RMS. | The L1 Pro16 bass amp is 1000 watts RMS. The Sub2 is 1000 watts RMS. | ||
| − | The L1 Pro16 is 118 dB SPL continuous. The Sub2 is | + | The L1 Pro16 is 118 dB SPL continuous. The Sub2 is 123 dB SPL continuous. |
| − | The L1 Pro16 goes down to 42 Hz (-3 dB). The Sub2 goes down to 37 Hz (-3 dB). | + | The L1 Pro16 goes down to 42 Hz (-3 dB). The Sub2 goes down to 37 Hz (-3 dB). The difference is due to the larger physical volume of the Sub2 enclosure. |
| + | === Two Sub1s or Sub2 === | ||
| + | Two Sub1s have approximately the same membrane surface area (180 square inches). | ||
| − | === Questions about this article | + | The power difference is negligible (960 watts RMS compared to 1000 watts RMS). |
| + | |||
| + | Two Sub1s tightly coupled (stacked or side-by-side) should provide up to +6 dB over a single Sub1 (118 + 6 = 124). The Sub 2 is 123 dB SPL. The difference is negligible. | ||
| + | |||
| + | The Sub1 goes down to 40 Hz. The Sub2 goes down to 37 Hz (-3 dB). The difference is due to the larger physical volume of the Sub2 enclosure. Running two Sub1s does not change the frequency response. | ||
| + | |||
| + | |||
| + | == Questions about this article == | ||
[https://twitter.com/ST_Muso/status/1395188406393655300 Questions about this article?] | [https://twitter.com/ST_Muso/status/1395188406393655300 Questions about this article?] | ||
Revision as of 19:55, 16 August 2021
Contents
- 1 Introduction
- 2 Documentation
- 3 Training
- 4 Firmware Updates
- 5 Comparisons Sub1/Sub2 Subwoofers
- 6 RaceTrack Woofer
- 7 Cardioid Mode
- 8 Level Control
- 9 Sub2 with Sub1
- 10 S1 Pro system with Sub1/Sub2
- 11 Preferred Method
- 12 Alternative Connection
- 13 L1 Compact with Sub1/Sub2
- 14 Cooling
- 15 Running Multiple Subwoofers
- 16 Comparing Power Stands to Subs
- 17 Questions about this article
Introduction
Introduced: October 2020
First available: January 2021
Use the Sub1 or Sub 2 bass modules with the Bose L1 Pro32
- Sub1 creates a compact system (down to 40 Hz)
- Sub2 plays lower and louder (down to 37 Hz)
- Extreme portability using RaceTrack woofers
Use the Sub1 or Sub 2 bass modules with other PA systems (e.g., Bose S1 Pro or third-party systems)
Documentation
Training
Firmware Updates
Version 5.06
May 26, 2021
- Fixes an issue that allows users to disable Low Power Standby mode.
- Allows wider range of Standby button press lengths when powering on product.
- Implements timed audio output mute when powering on product.
- Updates to green/red signal/clip LED threshold.
Installation
- Use a USB C cable (click the picture to the right to see where it connects on the Sub)
- Go to http://btu.bose.com using a PC or Mac
- Follow the prompts on the screen
- Instructions
Comparisons Sub1/Sub2 Subwoofers
| Specification | B1 | B2 | L1 Pro8 Power Stand only | L1 Pro16 Power Stand only | Sub1 | Sub2 | F1 Subwoofer |
|---|---|---|---|---|---|---|---|
| dB SPL at 1 meter Continuous/Peak |
109 dB (estimated, not published) |
112 dB (estimated on total system SPL of L1 Model 1S with B2) |
112 dB (cont) 118 dB (peak) (values estimated on total system SPL) |
118 dB (cont) 121 dB (peak) (values estimated on total system SPL) |
118 dB (cont) 124 dB (peak) |
123 dB (cont) 129 dB (peak) |
124 dB (cont) 130 dB (peak) |
| Watts RMS Active/Passive |
125 Passive |
250 Passive |
240 Active |
1000 Active |
480 Active |
1000 Active |
1000 Active |
| Weight pounds | 28 | 45 | 30.9 | 41.4 | 34.1 | 51.7 | 55 |
| Drivers | Two 5.25" | Two 10" | One 7"x13" RaceTrack | One 10"x18" RaceTrack | One 7"x13" RaceTrack | One 10"x18" RaceTrack | Two 10" |
| Cardioid Mode | n/a | n/a | n/a | n/a | Yes | Yes | n/a |
| Compatibility with Bose Products | L1 Legacy | L1 Legacy | n/a not intended to be used separately |
n/a not intended to be used separately |
L1 Pro, L1 Legacy, S1 Pro, L1 Compact | L1 Pro, L1 Legacy, S1 Pro, L1 Compact | L1 Pro, L1 Legacy, S1 Pro, L1 Compact |
| Compatibility with non-Bose products | No passive, no low-pass filter |
No passive, no low-pass filter |
n/a not intended to be used separately |
n/a not intended to be used separately |
Yes active, switchable low-pass filter |
Yes active, switchable low-pass filter |
Yes active, switchable high-pass filter |
- This data is compiled from Bose Technical Data Sheets and discussions with the Bose L1 Product Managers for the unpublished data.
- Two Sub1s or Sub2
Two Sub1s have approximately the same membrane surface area as the Sub2, (180 square inches).
The power difference is negligible (960 watts RMS compared to 1000 watts RMS).
Two Sub1s tightly coupled (stacked or side-by-side) should provide up to +6 dB SPL[1] over a single Sub1 (118 + 6 = 124). The Sub 2 is 123 dB SPL. The SPL performance of two Sub1s should be similar to a single Sub2.
The Sub1 goes down to 40 Hz. The Sub2 goes down to 37 Hz (-3 dB). The difference is due to the larger physical volume of the Sub2 enclosure. Running two Sub1s does not change the frequency response.
- L1 Pro16
The SPL output of the L1 Pro16 is 118 db SPL (124 peak). The output is similar to the Sub1.
- Technical Data for standalone units
- L1 Pro8 Technical Data Sheet
- L1 Pro16 Technical Data Sheet
- L1 Pro32 Technical Data Sheet
- Sub1 Technical Data Sheet
- Sub2 Technical Data Sheet
RaceTrack Woofer
- Unique RaceTrack woofers integrated in the Bose Sub1 and Sub2 modular subwoofers deliver powerful bass, have an optimized center of gravity, and save a lot of space. This slim design means you get the full impact of a conventional subwoofer without the cumbersome size, freeing up room in your vehicle and on the stage, and making every carry in between — home to car, vehicle to venue — much easier. [2]
Although the comparisons are approximate and this assumes that other variables like input power are similar:
- The 7"x13" RaceTrack woofer in the Sub1 is comparable to 12" round driver.
- The 10"x18" RaceTrack woofer is comparable to a 15" round driver.
Note: Both the Sub1 and L1 Pro8 use a 7"x13" RaceTrack woofer. The L1 Pro8 is rated at 240 watts RMS to the subwoofer. The Sub1 is rated at 480 watts RMS.
Cardioid Mode
Stack two Sub1 or Sub2 subwoofers in Cardioid Mode for focused, directional performance with reduced rear-firing bass energy (-10 dB SPL). This steers the bass out front, and reduces feedback. This is particularly useful when you have resonant instruments on the stage (e.g., kick drum, upright bass).
Note: Bose does not claim Cardioid mode increases the Sound Pressure Level (SPL) in front of the subwoofers. The main benefit is that it reduces the SPL behind the subwoofers.
See the tutorial in the video below starting at 4:05.
Level Control
- Question
- Why have a LEVEL control on the Bose Sub1/Sub2? This can also apply to other subwoofers as well.
- Answer
At lower volume, the Equal Loudness contour[3] shows that humans don't perceive bass as well as mid-highs. You can compensate for this by turning up the Sub1/Sub2 LEVEL Control.
Other times bass may seem excessive
- At higher volumes
- Due to boundary effects (proximity to walls and corners)
- On a resonant stage
You can compensate for this by turning down the Sub1/Sub2 LEVEL Control.
- Set the Sub1/Sub2 Level control at 12:00 o'clock[4].
- Raise/lower the volume of the L1 Pro32 as required.
- Adjust the Sub1/Sub2 Level control to balance bass level with the mid-high level from the L1 Pro 32.
Sub2 with Sub1
You can use a Sub1 and Sub2 together. The connection will be L1 Pro32 to Sub2 to Sub1
You can stack them or place them side by side. In any arrangement where the grilles fit completely within a 30-inch (75 cm) diameter sphere, your two Subs will act like a single one, only louder. Note: Placing the Subs on either side of the L1 Pro32 power stand does not meet this criteria.
There are two options. Either is fine. Choose the one you prefer.
- Option 1
- Same crossover frequency applied to both Sub1 and Sub2 (200—37Hz)
- Connect the L1 Pro32 to the Sub2 (use the supplied SubMatch cable)
- Connect the Sub2 to the Sub1 use a SubMatch cable (purchased separately) OR
- Connect the Sub2 Line Out to the Sub1 with an XLR cable and power the Sub1 with the supplied IEC power cable.
- On the Sub2 set the Line Out EQ to Full (Full Range)
- Level - set to 12:00 o'clock on both. If adjustments are necessary - keep the Level Control the same on both Subs
- Polarity: Plus on both
- Option 2
- Crossover frequencies:
Sub2: 100—37 Hz
Sub1: 200—100 Hz
- Connect the L1 Pro32 to the Sub2 (use the supplied SubMatch cable)
- On the Sub2 set the Line Out EQ to HPF (High Pass Filter)
- Connect the Sub2 Line Out to the Sub1 with an XLR cable and power the Sub1 with the supplied IEC power cable.
- Level - set to 12:00 o'clock on both. If adjustments are necessary - keep the Level Control the same on both Subs
- Polarity: Plus on both
S1 Pro system with Sub1/Sub2
Preferred Method
Connections with Sub1 or Sub2 and the S1 Pro system
For best results, the signal flow should go from
- The signal source (e.g., ToneMatch Mixer[5], mixer, DJ console) output to
- The Sub1 or Sub2 subwoofer LINE IN 1 ()
- The Sub1 or Sub2 subwoofer LINE OUT 1 to
- The S1 Pro system with channel volume set to 10 o'clock.
- Note these settings on the Sub1 or Sub2
- 👉 Set LINE IN EQ to L1
- 👉 Set LINE OUT EQ to S1 (Press and hold LINE OUT EQ button for 4 seconds)
Set up this way,
- The Sub1 or Sub2 handles frequencies from 40 Hz (Sub1) 37 Hz (Sub2) to 150 Hz
- The S1 Pro system handles frequencies above 150 Hz
- Mono - Example with a T4S as the audio source
- Start with the Volume on S1 Pro and Sub, as shown. Adjust as necessary from there.
The picture shows a stereo setup. The signal flow is from left to right.
- Recommended cable
Use an XLR to 1/4 inch (6.35 mm) Tip-Ring-Sleeve cable for best results.
If you use an XLR to XLR cable, the signal may be too hot for the S1 Pro system.
Alternative Connection
- Can I connect the S1 Pro Line Out to the Sub?
The method described above is preferred, but you can use the S1 Pro system as the sound source (e.g., microphone and guitar and backing tracks via Bluetooth) Note the following:
- The S1 Pro system will sound the same as without the subwoofer (62 Hz - 17 kHz)
- The Sub1 or Sub2 will cover from 40 Hz (Sub1) 37 Hz (Sub2) to 150 Hz
- You will be able to push S1 Pro system harder (louder) if you route the signal as described at the top of this article
L1 Compact with Sub1/Sub2
Please see L1 Compact with Sub1 or Sub2
Cooling
- Question
How are the Sub1/Sub2 cooled?
- Answer
Sub1 and Sub2 have extruded aluminum heat sinks mounted to the backside of the I/O panel. This pulls heat out of the electronics and transfers some to the air moving through the acoustic volume of the sub and helps to cool.[6]
Running Multiple Subwoofers
If you are running two or more subwoofers, you want to read these articles:
Comparing Power Stands to Subs
L1 Pro8 Power Stand compared to Sub1
Both use the 7"x13" Racetrack transducer
The L1 Pro8 base is 31 pounds. The Sub1 is 35.5.
The L1 Pro8 base is slightly smaller than the Sub1.
The L1 Pro8 bass amp is 240 watts RMS. The Sub1 is 480 watts RMS.
The L1 Pro8 is 112 dB SPL continuous. The Sub1 is 118 dB SPL continuous.
The L1 Pro8 goes down to 45 Hz (-3 dB). The Sub1 goes down to 40 Hz (-3 dB).
L1 Pro16 Power Stand compared to Sub2
Both use the 10"x18" Racetrack transducer
The L1 Pro16 base is 41.4 pounds. The Sub2 is 52.
The L1 Pro16 base is slightly smaller than the Sub2.
The L1 Pro16 bass amp is 1000 watts RMS. The Sub2 is 1000 watts RMS.
The L1 Pro16 is 118 dB SPL continuous. The Sub2 is 123 dB SPL continuous.
The L1 Pro16 goes down to 42 Hz (-3 dB). The Sub2 goes down to 37 Hz (-3 dB). The difference is due to the larger physical volume of the Sub2 enclosure.
Two Sub1s or Sub2
Two Sub1s have approximately the same membrane surface area (180 square inches).
The power difference is negligible (960 watts RMS compared to 1000 watts RMS).
Two Sub1s tightly coupled (stacked or side-by-side) should provide up to +6 dB over a single Sub1 (118 + 6 = 124). The Sub 2 is 123 dB SPL. The difference is negligible.
The Sub1 goes down to 40 Hz. The Sub2 goes down to 37 Hz (-3 dB). The difference is due to the larger physical volume of the Sub2 enclosure. Running two Sub1s does not change the frequency response.
Questions about this article
- ↑ +3 dB from doubling the power and +3 dB from mutual coupling.
- ↑ RaceTrack Woofer on pro.bose.com
- ↑ Equal Loudness contour
- ↑ Bose Sub1 & Sub2 Powered Bass Modules Owners Guide
- ↑ T4S ToneMatch mixer or T8S ToneMatch mixer or T1 ToneMatch Audio Engine
- ↑ Bose Professional