OMNITRONIC LH-030 4xHEADPHONE AMPLIFIER

• Distributes the signal of 1 audio source to 4 sets of headphones
• 4 channels with separate level controls and headphone outputs
• All connections via 6.3 mm (1/4“) jacks
• Operation via supplied power unit

• Plugs directly into your guitar, a great-sounding headphone guitar amp that gives you serious sound fast
• AUX in jack lets you jam along with your CD/MP3 player
• 100% analog circuit faithfully simulates the response of the original amps
• AC30 emulates the AC30 top boost sound of a vintage VOX AC30
• Up to 15 hours of battery life with two Alkaline AAA batteries
• Quick and easy setup! Just connect amPlug to your guitar and enjoy serious sound
• Dimensions (W x D x H): 86 x 80 x 31 (mm), 3.39 x 3.15 x 1.22 inches
• Weight: 40g /1.41oz. (not including batteries)
• Included items: two AAA zinc-carbon batteries

The PHDA02 - a reference class headphone amplifier with Stereo, Mono, and Dual Mono operation modes.

In Stereo mode, the L/R input signal is fed to the left and right earphones while the volume level is set by the Stereo/Left control. The front panel inputs provide simultaneous connection of two headphones in parallel. In Mono mode, the left and right channels are summed, and the resulting mono signal is fed to both the left and right earphones. Again, volume is governed by the Stereo/Left control. In Dual Mono mode, the left and right channels can be used independently with individual level controls for the left and right earphones.

The PHDA02 operates with all headphones with an impedance of 8 up to 200 Ohms. Impedance matching is achieved by a specially designed switchable transformer. Uncommon and costly, this solution provides superior performance, dynamic range, and signal-to-noise ratio at all loads.

Combo input sockets allow for balanced XLR and unbalanced TS headphone connection while parallel XLR outputs facilitate daisy chaining multiple units. The integrated power supply operates with mains from 100 VAC to 240 VAC.

The PHDA02 is equipped with low-noise op amps, and the output amplifiers' discrete power transistors are mounted on heatsinks. Dimensions are 1 U 9.5“.

Overview

Sound can be perfected with Sennheiserʼs HDVA 600. Delivering authentic sound in its purest form, listeners are treated to a world of sheer listening pleasure. Years of knowledge in audio engineering and innovations in acoustic amplification, resulted in the creation of the HDVA 600. The consistently symmetrical signal processing and extremely low harmonic distortion guarantees an absolutely precise sound. Also, thanks to their pre-amp performance, they are easy to adjust and be connected directly to speakers for optimum audio amplification. In essence, the HDVA 600 provides a spectacular listening experience when paired with any Sennheiserʼs audiophile headphones.

Features
Consistently symmetrical signal processing for maximum sound quality
Symmetrical inputs and outputs simplify integration into a system
High-end ALPS quadruple potentiometer achieve perfect channel equality
Variable gain factor (five stages) for optimized use of low impedance headphones
Sophisticated metal housing to protect against signal scatter and vibration
Solid controls turned from solid metal, providing the utmost in long-term stability

HeadAMP - Four Output Stereo Headphone Amp Overview

Most home recordings involve from one to four people, any or all of whom are
going to need headphone monitoring. The monitor amp would be connected
to the tape deck?s headphone output or a mixer output so that the performers
can hear themselves and each other. Of course the same application can apply
to band rehearsals and even home entertainment. HeadAMP provides amplification
and individual volume control for up to 4 headsets. It can be driven by either line-
level or headphone amplifier signals (mono or stereo).

HeadAMP - Four Output Stereo Headphone Amp Specifications:

Signal To Noise Ratio >90dB
IMD (SMPTE) 0.01%
Maximum Input Level +14dBV
Maximum Output Level 20dB per channel
Output Impedance 51 Ohms per channel
Output Connectors Four stereo 1/4? headphone outputs
Power Requirements 12V DC (Adapter included) 
Total Harmonic Distortion

The amPlug Twin rolls back the years to capture the sound of the legendary clean American dual speaker combo tube amp. Noted for its sparkling and sustained clean sound, this amp has been is widely used in many genres - rock, blues, jazz, country, and more. Raising the gain provides a powerful American tube overdrive sound. A stereo chorus effect is built into the amPlug Twin, adding natural spaciousness and depth to the sound. As you play these sounds, you're sure to forget the passage of time, and lose yourself in the tones loved by musicians in styles such as jazz, country, and blues.
Specifications

• Controls: Gain, Tone, Volume; STANDBY/ON/FX switch
• Terminals: PHONES Jack (stereo), AUX In Jack (stereo)
• Power supply: AAA batteries (x 2)
• Battery life: amPlug Twin (FX on):
• With zinc-carbon batteries: approximately 3 hours
• With alkaline batteries: approximately 11 hours
• Dimensions (W x D x H): 86 x 80 x 31mm/3.39" x 3.15" x 1.22“
• Weight: 40 g/1.41 oz. (not including batteries)
• Included items: AAA batteries (X2) (for verifying operation)