The two headphone output sockets are sensibly located at the bottom of the unit, each with an individual volume control. The front panel is classic SPL, painted black with grey strips to identify each control section and clear white lettering. Looking at the published specifications, SPL state that the unit draws a total (across two rack channels) of 260mA from the rack power supply, and the maximum input level is +21dBu, with an A-weighted noise figure of -92.3dBu and THD (total harmonic distortion) of 0.0024 percent (driving 600Ω headphones at 0dBu).
#Spl amp reviews manual
The manual contains explicit warnings about not plugging in mono (TS) jack plugs, as the resulting right-channel short-circuit could damage the amplifier circuitry.
All the ICs are socketed with well-proven and reliable industry-standard devices including a pair of NE5534s and four TLO72s, which appear to handle the I/O and cross-feed matrix functions, while four TLO71s supplemented with discrete push-pull pairs of transistors (BC546/BC556) drive the headphone outputs. Physically, the whole unit is shrouded within a steel screening case, while, internally, conventional through-hole electronics are mounted on two high-quality circuit boards.
The input signals are passed straight back to the rear-panel outputs, though, so that the monitoring signal can also be routed on to a loudspeaker monitor controller, if required. This double-width, dual-output headphone amp is based closely on the company’s well-established Phonitor range of products, and it includes the comprehensive cross-feed matrix facilities that are such a big part of the other models in the range.Īs a stereo headphone amp the HPm obviously requires two audio inputs, which is why it has to be a double-width module. I can foresee situations where having a headphone module in the rack makes a lot of sense, and SPL have addressed this potential requirement with their new HPm. High level input and a power-remote-ground power connector that makes disconnectingĪnd removal of the amp powered enclosure a snap.There are countless 500-series mic preamps, equalisers, dynamics processors, reverbs, and even delays, bitcrushers and A-D converters on offer, but I can’t recall seeing any headphone amplifier 500-series modules before now (although one or two larger racks have a built-in monitoring system). The 300.1SBA features quick disconnect RCA,
#Spl amp reviews professional
Whether you are making a custom designed enclosure or using an off-the-shelf type, this amp is your professional solution to adding an amp to any subwoofer box.
The 300.1SBA is an enclosed 336 watt RMS, Class D amplifier built into an air tight, impact resistant ABS enclosure with sealed subwoofer leads to prevent internal sub box air from leaking into and out of the amplifier.
#Spl amp reviews pro
Pro Tuned 10" Single SPL Vented subwoofer enclosure with a built-in 300 watt amplifier designed for optimum bass response and low frequency reproduction.
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