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Filters & signal processors
GP-LPSUB
Give the low end its own path.
Create a subwoofer feed from an available line-level output.
$679.00
- Low-pass filter
- Below 30 Hz
- DC
- Blocked
- Outputs
- Balanced XLR and RCA sub outputs
Every connection has a purpose
A dedicated subwoofer branch.
Create a mono subwoofer feed from stereo line-level inputs, with a separate subwoofer level control.
An analog low-pass circuit combines the left and right channels. Front RCA connections provide line-level pass-through; rear RCA and balanced XLR outputs feed compatible powered subwoofers or power amplifiers.
The balanced output includes a ground-lift switch. The AC input is EMI filtered.
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Illustrative placement. Confirm levels and connections with your equipment.
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G Pulse Linear
GP-LPSUB
Create a subwoofer feed from an available line-level output.
Manufacturer-supplied specifications- Low-pass filter
- Below 30 Hz
- DC
- Blocked
- Outputs
- Balanced XLR and RCA sub outputs
- Ground lift
- Included
- Ground lift
- Yes
- Supply options
- 100-240 VAC, 50/60 Hz
- RF filtering
- AC EMI filtered
- Dimensions
- 5" W x 2" D x 1.5" H
- Filter
- Low-pass sub filter below 30 Hz
- Filter response
- 0 dB reference at 35/65 Hz; -1 dB at 1 Hz; DC blocked
- Filter attenuation
- -57 / -38 dB at 200 Hz (E1-E4 if installed)
- Fuse
- 2 A FB internal
Compare system roles
Explore how these G Pulse components differ. Some serve different positions in your system.
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| Feature | G PULSE LINEARGP-LPSUBFilters & signal processors | G PULSE LINEARGP-3000Source controllers | G PULSE LINEARGP-2000Preamplifiers |
|---|---|---|---|
| System role | GP-LPSUB Subwoofer Signal Generator | GP-3000 Audiophile Source Controller and Sub-Sonic Signal Generator | GP-2000 Full Feature Audiophile Preamplifier |
| Low-pass filter | Below 30 Hz | Not listed | Not listed |
| DC | Blocked | Not listed | Not listed |
| Outputs | Balanced XLR and RCA sub outputs | Not listed | Not listed |
| Ground lift | Included | Not listed | Not listed |
| Inputs | Not listed | Four stereo line sources + Bluetooth 5.0 | Not listed |
| Gain | Not listed | Unity | Not listed |
| Switching | Not listed | Sealed replaceable relays | Not listed |
| Subwoofer | Not listed | Level and phase control | Not listed |
| Channels | Not listed | Not listed | Five |
| Chassis | Not listed | Not listed | 19-inch rack mount |
| Connections | Not listed | Not listed | Balanced XLR and RCA |
| Tone controls | Not listed | Not listed | Separate bass and treble for each channel, with dedicated turnover frequencies |
G Pulse published specifications, last reviewed October 21, 2026. These models hold different positions in a system, so the rows compare features rather than rank performance. “Not listed” means the supplied sheet for that model does not document the feature. Component-level figures are excluded from unit-level comparisons.
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