User manual SAMSON S.PHONE HEADPHONE MIXER AMP

[. . . ] Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888 www. samsontech. com 1 Introduction Congratulations on purchasing the Samson S·phone Headphone Amplifier!Although this unit is designed for easy operation, we suggest you take some time out first to go through these pages so you can fully understand how we've implemented a number of unique features. The S·phone is a compact, high-quality device that allows you to monitor any stereo or monophonic source signal (balanced or unbalanced) over as many as twelve separate headphones. Providing unusually high power levels and superb audio fidelity, the S·phone is compatible with virtually all popular headphone models. [. . . ] 14 HIGH FREQUENCY EQ - Controls the amount of high frequency EQ applied to headphone output. 15 LOW FREQUENCY EQ - Controls the amount of low frequency EQ applied to headphone output. 16 VOLUME CONTROL - Controls the volume to the headphone output for the individual channel. 17 PAN CONTROL - Controls the balance from left to right in stereo mode and from aux to main mode. E F G S MINIMUM IMPEDANCE 8 OHMS LEFT MONO CHANNEL 1 OUTPUTS LINK OUTPUT LEFT RIGHT MAIN INPUT LEFT RIGHT E CHANNEL 1 OUTPUTS - 2 rear panel headphone outputs for Channel 1. LINK OUTPUTS - Outputs that are tied to the main input for linking to another headphone amp or other device. Plugging into the left jack only sends the signal to both the left and right. 5 F G Operating the S·phone SETTING UP THE S·phone Setting up your S·phone Headphone Amplifier is a simple procedure, which takes only a few minutes. Remove all packing materials (save them in case of need for future service) and plug the provided AC power cord in the rear AC inlet, but don't plug the power cable into a wall outlet just yet. · Connect the output from the device you want monitored to the Left/Right MAIN INPUT jacks on the S·phone rear panel. Generally, a balanced signal is preferable because it provides better signal-to-noise ratio and reduced extraneous noise. Conversely, if you find that you have to raise one or more headphone Channel Volume knobs to maximum or near maximum to achieve the desired level, try increasing the Master Volume Level while decreasing the channel volume(s). · S · Phone Master Section 1 Master Volume The S phone's MASTER VOLUME control is used to adjust the input signal connected to the MAIN Left and Right inputs. In addition, the MASTER VOLUME control adjusts the level of the signal inserted in the MASTER INJECT, which is summed with the MAIN Left and Right input signal. MASTER LEVEL dB -30 -24 -18 -12 -6 0 +6 2 CLIP 5 2 Master Level meter The S·phone's maser section includes an 8 segment LED LEVEL meter which monitors the input level of the MAIN Left and Right Inputs in Decibels (dBs) from ­30 to CLIP. If the LEVEL meter displays a CLIP signal, then turn down the signal being sent into the MAIN left and Right. HEADPHONE MIXER/AMP OFF AUX 10 MAIN 1 MASTER VOLUME INJECT 3 3 Using the Master Inject The S·phone's MASTER INJECT is a TRS input (Tip, Ring, Sleeve) that allows a second stereo signal to be inserted and summed together with the MAIN Left and Right signals. You can use a stereo signal from your mixers buss outputs or auxiliary sends to balance the mix between two stereo signals like rhythm tracks and vocals. 7 Operating the S·phone S · PHONE CHANNELS 1 Headphone Output The S·phone's Headphone Output jack accepts a standard 1/4" TRS connector for easy interface with most professional headphones. Once the MASTER VOLUME has been set, the channels output level is set by the VOLUME knob. CHANNEL LEVEL dB -30 -24 -18 -12 -6 -3 0 CLIP 8 4 CHANNEL 1 0 4 5 -30 - MUTE / ON 2 1 ST / 2CH 3 8 8 12 4 HF 12 4 0 VOLUME 10 7 MUTE 2 Channel MUTE Switch The S·phone features Mutes Switches on each of the four channels. When engaged, the LED illuminates and indicates that the channel output is turned off. PHONES AUX IN 8 8 12 LF 12 L AUX R PAN MAIN PHO 4 5 6 3 ST/2-CH Stereo Two Channel Switch Each of the S·phone's four channels can be set to operate in two modes: Stereo and Two-Channel. In stereo, mode all signals inserted into the signal path including the MAIN, MASTER INJECT and Channel AUX input, maintain their stereo image. In 2-Channel mode, the signals are all summed to mono and the PAN control now becomes the balance between the MAIN stereo mix and the AUX input. More info on 2-Channel mode on page 11 of this manual. 4 AUX Input Each of the S phones four Channels features an AUX input for inserting a signal directly into that channels headphone amp. The AUX input is particularly useful for adding a solo instrument or vocal send. In this case, the AUX input is mixed with the MAIN mix so that listeners on that channel can have their own balance between the MAIN mix and their instrument or vocal. Depending on the status of the STEREO/2-CHANNEL switch, the AUX level is adjusted at the signal source, like the aux send from a mixer, or by using the PAN control. 5 Using the Channel EQ Each of the four S·phone channels feature a two-band equalizer allowing individual tone settings on each channel. The LOW Frequency EQ control provides up to 12 dB of CUT or BOOST at 100Hz. [. . . ] As described on page 9 of this manual, headphones with lower impedances (or higher sensitivity) will sound louder as compared to other, higher impedance (or lower sensitivity) headphones at the same channel Volume setting. Samson Technologies has no connection with any of these manufacturers, nor do we endorse any particular models for use with the S·phone. For more information about any of these headphones, contact the manufacturer directly. SAMSON HEADPHONES Model Impedance PH60 RH100 RH300 RH600 CH70 CH700 Sensitivity OTHER MANUFACTURER'S HEADPHONES Manufacturer Model Impedance AKG K-141 600 ohm AKG K-240 600 ohm Beyer DT-150 250 ohm Beyer DT-801 250 ohm Fostex T-10 50 ohm Fostex T-20 50 ohm Fostex T-40 50 ohm Sennheiser HD-450 (original) 70 ohm Sennheiser HD-450 Series II 60 ohm Sony MDR-7502 45 ohm Sony MDR-7504 45 ohm Sony MDR-7506 63 ohm Sensitivity 98 dB 88 dB 114 dB 114 dB 91 dB 96 dB 98 dB 94 dB 94 dB 100 dB 103 dB 106 dB 13 S·phone Wiring Guide Unbalanced 1/4" Connector Signal Signal Tip (signal) Ground Ground Sleeve (ground) Balanced TRS 1/4" Connector Signal (ring) Tip (signal) Ring (signal) Signal (tip) Signal (tip) Signal (ring) Ground Ground Sleeve (ground) Insert Cable 1/4" TRS connector to two 1/4" can be used to connect a stereo signal to the Channel AUX or Master Inject. Tip (send) Sleeve (common) Sleeve (ground) Send (tip) Return (ring) Tip (send) Ring (return) Send (tip) Return (ring) Common Common Sleeve (common) Sleeve (common) Tip (return) XLR Balanced Wiring Guide Hot Common Common (1) Hot (2) 1 3 2 2 3 1 Solder Points Cold End View Female XLR Cold (3) Hot (2) Common (1) Common Hot 1 3 2 2 3 1 End View Solder Points Cold (3) Cold Male XLR 14 Specifications Master Section (Rear Panel) Input Impedance Max. input level CMRR: Master Section (Front Panel) Master Volume control Master Level Meters Master Inject Link Output Connectors Max Output Level Channels AUX IN Connectors Impedance Max. [. . . ]