Using a single 300B output triode for each channel, the amplifiers surprise critics not just with their resolution but with dynamics and control which are thought to be beyond single-ended designs. The poor bass and weak dynamics that are associated with designs of this type are removed by the sophisticated external power supplies and the amplifiers are models of sweetness, clarity and vibrancy with fine, extended bass and dynamics.
The winner of a prestigious HiFi Choice Editors Choice award and featured in the HiFi Choice Collectors Edition, the BorderPatrol Control Unit is a high quality tube pre-amplifier that combines the very best tone and resolution coupled with the ability to swing real dynamics and remain graceful and composed on all music programs. The super low noise floor reveals nuance and inflection that is buried by other designs and brings the listener closer to the players.
The Control Unit is equally at home playing all music genres and we are sure that it’s musical capabilities will more than exceed your expectations.
Single stage triode line-stage pre-amplifier.
Zero negative feedback.
Hard wired audio circuit.
Tube rectified LCLC choke input filter PSU.
Inputs: 5 x line level inputs marked as Phono, CD, Tuner, Line and Tape but any line-level component such as a DVD player or VCR can be used.
Outputs: 2 x outputs to facilitate bi-amping or connection to an active subwoofer.
1 x tape out. This output can also be connected to 5 channel processor.
Frequency response: -3dB 7Hz-200kHz.
Input voltages: 0-220-230-240V or 0-110-115-120V
Recommended Interconnect length: <5m. Low capacitance interconnects are recommended.
Dimensions: 450mm x 350mm 120mm
Single-ended S10 are dual mono designs that feature two PSU’s, one for each channel. Mounting the PSU’s externally not only keeps the weight and size of the amplifiers manageable, it keeps the hard working iron and its electric fields away from the sensitive audio circuitry. It also allows a degree of power supply elaboration and sophistication not found in other tube amplifiers.
Each PSU contains three independent tube rectified, choke input filter high voltage supplies to independently feed the 300B’s, the input/driver tubes and the negative bias supply, together with filament supplies for the 300B’s and small signal tubes. The use of choke input filtering is a critical difference and is unique to BorderPatrol power amplifiers. Other brands use tube rectification and choke smoothing but do so in the cheaper, smaller and easier to implement capacitor input filter configuration. A choke input filter design has far superior voltage regulation (stiffness) and noise rejection. The PSU’s stiffness explains why the BorderPatrol amplifiers have bass performance and dynamics unlike any other 300B amplifiers.
In a BorderPatrol amplifier, all aspects of the design have been taken into consideration: audio circuit, power supply, tube complement, materials and component quality. The solutions have been chosen after many hours of listening. The result is the most complete sounding range of tube amplifiers available today and a rare combination of dynamics, integration, resolution and musicality.
The BorderPatrol S10 and SE300B continue to redefine the capabilities of 300B single-ended amplifiers. Using a single 300B output triode for each channel, the amplifiers surprise critics not just with their resolution but with dynamics and control which are thought to be beyond single-ended designs. The poor bass and weak dynamics that are associated with designs of this type are removed by the sophisticated external power supplies and the amplifiers are models of sweetness, clarity and vibrancy with fine, extended bass and dynamics.
The S10 features a single ended output stage which is the simplest and purest circuit topology available. It is dual mono and each channel has its own an external power supply unit.
Good condition. No box.