BorderPatrol
S20EXD
Introduced 2010$22,500 MSRP
BorderPatrol is a small Maryland-based manufacturer whose amplifiers are point-to-point hand-wired in-house with no printed circuit boards, sold direct with a compact dealer network; the S20EXD is a dual-mono parallel single-ended 300B design with outboard, cryogenically treated tube-rectified power supplies.
MSRP
$22,500
Used market
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Specifications
- Price
- Starts at $22,500 (2024/2025 show pricing)
- Wiring
- Point-to-point wiring throughout
- Topology
- Parallel single-ended, dual mono
- Output power
- 18 Class A watts per channel
- Output tubes
- 2 pairs of Western Electric 300B per channel
- Power supply
- Two external tube-rectified, choke-input-filtered PSUs (one per channel)
- Speaker outputs
- 4-ohm and 8-ohm taps
- Coupling feedback
- Interstage transformer coupling; no negative feedback
- Input driver tubes
- 2 x NOS Sylvania 6DR7 double-triode tubes
- Related p series pricing context
- BorderPatrol P20 EXD EXS stereo amp, $25,750
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