BorderPatrol S20EXD Parallel Single-Ended Amplifier
Best pure sound for discerning audiophiles seeking musicality.
The BorderPatrol S20EXD Parallel Single-Ended Amplifier delivers 18 Class A Watts per channel, utilizing two pairs of Western Electric 300B tubes. This dual-mono design features interstage transformer coupling, directly connecting the input driver tubes to the output tubes. It includes a pair of tube-rectified external power supplies, one for each channel, and boasts point-to-point wiring throughout. Notably, the S20EXD omits negative feedback to prioritize musical performance. Each power supply incorporates three independent tube-rectified, choke-input filter high-voltage supplies for the 300B's, input/driver tubes, and bias supply, along with filament supplies. The amplifier offers 4 and 8 Ohm speaker outputs and single-ended RCA inputs. An optional volume control is available.
$22500.00
Owner Satisfaction
4.4
/ 5
Category Rank
2258
/ 2553
#2258 in Power Amplifiers
Price vs Category Average
+173%
Above average
Channels
2
Who it's for
- Audiophiles seeking an immersive and emotionally resonant listening experience
- Listeners prioritizing realistic vocal and instrumental timbre in their music
- Discerning buyers who value high-quality construction and lasting value
Who should skip it
- Music lovers with low-sensitivity speakers or large listening spaces
- Budget-conscious consumers or those new to high-fidelity audio
- Users preferring maintenance-free components or cool-running electronics
Key Specs
Channels
2
Amplifier Class
Class A
Power Output
18 Watts per channel
Speaker Impedance
4 Ohms, 8 Ohms
Input
Single-ended RCA
Construction
Point-to-point wiring
Power Supply
Dual mono, tube rectified external power supplies
Tube Rectifiers (per PSU)
Mullard GZ37/CV378, EZ80 (x2)
Features
- Class A amplification for pure sound
- Dual mono design for channel separation
- Tube rectified power supplies
- Choke input filtering for cleaner power
- No negative feedback for natural sound
- Point-to-point wiring for signal integrity
- Optional volume control
What customers say
Customers consistently praise this amplifier for its exceptional sound quality, often describing it as warm, musical, and highly detailed. Many appreciate its ability to bring recordings to life with a natural presentation. The amplifier's robust build and elegant design also receive high marks, reflecting a commitment to craftsmanship. Owners feel it offers a distinctive and immersive listening experience, making it a cherished component in their audio setups. Its unique sonic signature and solid construction are frequently highlighted as primary strengths.
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$22500