RAAL requisite HSA-1b Headset and Speaker Amplifier User Manual

RAAL requisite HSA-1b Headset and Speaker Amplifier

INTRODUCTION

• The HSA-1b Headphone & Speaker Amplifier provides Direct-Drive amplification for True-Ribbon Earfield Monitor headphones, hi-efficiency speakers, conventional dynamic and planar magnetic headphones.
• Primarily, the HSA-1b amplifier was designed to drive ribbon-based headphones (low impedance hence high current demand). It can drive classic type headphones with impedances in the 20 – 600Ω range.
• The desirable sensitivity of the classical type headphones should be in the range of 92-100dB so that the declared sound pressure levels and acceptable s/n ratios could be achieved.
• Sound quality and tonal balance, which are of the highest standard, are not reduced when headphones outside of the recommended sensitivity range are used,
• Signal to noise ratio is at a required level and will never be compromised with any side effects which could occur when high sensitivity (100dB and above) headphones are used.
• Input Options include: Single-Ended (unbalanced) RCA, True-Balanced 3-pin XLR with 3-position DIP switch providing 0dB,
• -6dB and -10dB input sensitivity.
• The HSA-1b also includes a precision 24-step volume attenuator for rock-solid left/right balance throughout entire dial range.
• We sincerely appreciate your trust in our work, as evidenced by your purchase, and hope you will benefit by a lifetime of beautiful music and joyful ownership.
• Happy Listening,
• Alex Radisavljevic
• Danny McKinney

What’s In The Box

• HSA-1a User Manual (this booklet)
• HSA-1b Headset & Speaker Amplifier
• Cable – Amp to Low Efficiency Headphone 4-Pin XLR (1) Cable – “Y” type for running two ribbon headphones
•  Cable – 115VAC Power (North America)
• Banana to Binding Post Adaptors (left/right pairs) for Speaker Connection Flexibility

Optional Equipment

Flight Case – Carry On with Wheels and Retractable Handle. Includes Hi-Quality Foam Lined Interior.

Power Requirements

• User Selectable Mains Voltage 115VAC & 3-Amp Fuse, IEC cable provided (North America).
• User Selectable Mains Voltage 230VAC & 1.6-Amp Fuse, user-provided local IEC cable.
• Internally Set 100VAC Mains (Japan) & 2.5-Amp Fuse, user-provided local IEC cable
• Be sure to check that the mains voltage selector switch is set to the correct voltage. The switch is located at the top, front, lefthand side. It is red colored and labeled 110/220.

Input Sensitivity Adjustment

This amplifier features internal sensitivity adjustments of the XLR inputs. This sensitivity is adjusted via dip switches located on a small printed circuit board located vertically on the input XLR board which holds the female three way XLR connectors at the rear of the amplifier. The factory setting is -6dB.

Speaker Output Connections

• Loudspeakers are connected to the amplifier by 4mm female connectors, located at the rear of the amplifier.
• The connectors are colored black, which is the negative (ground connection) and red which is positive (plus connection) for each channel respectively.
• The amplifier does not have a loudspeaker short circuit protection. Wrongly connected or shorted speakers output will damage the amplifier.

Front Panel Features

1.  Power: On/Off
2. Headphone Select: SR1 baffle-step compensation for SR1a headphones HP select for driving conventional headphones
3. Output Select: HP (Headphone) output to front panel jacksSPK (Speaker) output to rear panel banana jacks In this position, baffle-step compensation is disabled.
4. Input Select:XLR Balanced 3-pin RCA Single-Ended (unbalanced)
5.  Volume:24- step Attenuator
6.  Ribbon Output XLR: Female 4-pin XLR for driving Ribbon Headphones Male to Male adaptor cable (provided) allows connection to drive low-efficiency headphones
7. Conventional Output XLR: M/XLR for dynamic and planar-magnetic headphones
8.  Conventional Output 6.3mm stereo (1/4”) TRRS: For dynamic and planar-magnetic headphones

Rear Panel Connections

1. Rear Panel ConnectionsStandard IEC connector Fuse Holder 3A for 120V operation1.6A for 230V operation2.5A for100V (Japan) operation
2. RCA audio input: Single-Ended unbalanced analog input
3.  XLR audio input:3- pin XLR balanced analog input Pin 1 GroundPin 2 Positive going phase-in 3 Negative going phase
4. Speaker Outputs:Banana speaker connections (4) Binding Post adaptors provided (4)

SPECIFICATIONS

IMPORTANT NOTICE

The amplifier does not have loudspeaker short circuit protection. Short circuit protection degrades sound quality, hence it is not used. A wrongly connected or shorted speaker’s output will damage the amplifier.

• Load impedance: 0.3ohm – infinity on headphone output connectors. Output power (one channel driven): 10W/8Ω, 20W/4Ω, 40W/2Ω
• 55W/1Ω @ 1kHz/sine wave Frequency Response: 100mv/ in/sin. 15Hz – 500kHz
• Power bandwidth: 100kHz (-3db) at 1W
• Distortion: < 0.5% at 1kHz
• Signal to noise: better than 90db
• Input impedance: 40k Ω
• Sensitivity: 0.5V /40k Ω
• Input connectors: INPUT 1- 2 RCA, INPUT 2 – 2 XLR 3pin (female) Output connectors: 1 x XLR 4-pin male (true-ribbon headphones)
• 1x XLR 4pin – female and 6.3mm stereo jack (conventional headphones) 20 – 600Ω
• Max power consumption: 150W, without signal 25W
• Working voltage: 115V/230VAC (selector switch)
• DimensionsHeight 90mm, Width 218mm, Depth 320mmHeight 3.54 in, Width 8.58 in, Depth 12.60 in
• Weight net: 5.3kg / 11.70 lbs.

Europe
Aleksandar Radisavljevic alex@raalrequisite.com Tel: +381 64 144 1111
Djordja Simeonovica 4 19000 Zajecar
Serbia

U.S.A.
Danny McKinney danny@raalrequisite.com Tel: 818-437-0779
2175 Goodyear Avenue Suite 110
Ventura, California 93003

Limited 5-Year Warranty

RAAL-requisite warrants its products to be free from defects in material and workmanship under normal use and service for a period of five (5) years from the date of delivery.This warranty is only made to the original purchaser and is not transferable. In the event of failure of a product under this warranty, RAAL-requisite will repair, at no charge, the product returned to its factory. RAAL-requisite may, at its option, replace the product in lieu of repair. If the failure has been caused by misuse, neglect, accident or abnormal operating conditions, repairs will be billed at the normal shop rate. In such cases, an estimate will be submitted before work is started, if requested by the customer. ALL OTHER WARRANTIES ARE HEREBY DISCLAIMED.
This warranty does not cover:

1.  normal wear and tear or normal aging of the product;
2. . cosmetic damage, including but not limited to scratches and dents;
3. damage through accident, abuse, neglect, misuse, natural events, or other external causes;
4. damage through misapplication, overloading, or improper usage;
5. damage due to improper maintenance and repair;
6. damage as a result from the shipping and handling by third parties; or
7. product alterations.

Limitation of Liability

EXCEPT AS PROVIDED IN THIS WARRANTY AND TO THE MAXIMUM EXTENT PERMITTED BY LAW, REAL-REQUISITE IS NOT RESPONSIBLE FOR ANY DIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR INJURIES RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION, INCLUDING BUT NOT LIMITED TO LOSS OF USE; LOSS OF REVENUE; LOSS OF ACTUAL OR ANTICIPATED PROFITS; LOSS OF BUSINESS; LOSS OF OPPORTUNITY; LOSS OF GOODWILL; LOSS OF REPUTATION; OR ANY DIRECT OR INDIRECT OR CONSEQUENTIAL LOSS OR DAMAGE WHATSOEVER CAUSED INCLUDING THE REPLACEMENT OF EQUIPMENT AND PROPERTY.

Customer Responsibilities

Customers may be required to provide proof of purchase date, respond to questions designed to assist with diagnosing potential issues and follow RAAL- requisite’s directions to make a claim on your warranty. DO NOT OPEN THE PRODUCT. OPENING THE PRODUCT MAY VOID YOUR WARRANTY. To make a warranty claim:
1. Contact us either through:
phone: 818-437-0779
email: danny@raalrequisite.com
office: 2175 Goodyear Ave, STE 110. Ventura CA. 93003-7761

REAL-requisite’s Responsibilities

1.  We will try to assist you in operating or repairing your product.
2.  If we determine a replacement part is necessary, we will send you a free replacement part.
3.  If we determine a replacement will not resolve your problem, we may ask you to return your product to our warehouse. Upon receiving the product at our warehouse, RAAL-requisite will inspect the product.
4.  If we determine that the product has a manufacturing defect we will send you a replacement part. If replacement of the part or repair of the unit is not possible, RAAL-requisite will send you a replacement product.
5.  Customers who purchased the product from a third-party vendor are not eligible for a refund from RAAL-requisite.
   RAAL-REQUISITE SHALL HAVE THE EXCLUSIVE RIGHT TO DETERMINE IF A UNIT IS COVERED UNDER ITS WARRANTY POLICY. Severability:
   The invalidity, illegality or unenforceability of any provision of this warranty shall not render the other provisions invalid, illegal or unenforceable. Governing Law and Jurisdiction:
   This warranty shall be governed by the laws of the State of California. The courts of California shall have the exclusive right to adjudicate any disputes arising under or in connection to this warranty.

Safety

1.  If you don’t know how to install audio devices, get a qualified professional to help.
2.  Never use this device near water, and clean only with a dry cloth.
3.  Assure adequate ventilation, do not block any ventilation openings, or place near heat sources.
4.  Use only the supplied power cord or a suitable replacement. Route cords away from traffic areas and protect them from being pinched. Unplug the cord from the outlet if the apparatus is unused for a long period of time.5. To prevent electric shock, do not use the plug with an extension cord, receptacle, or outlet unless blades can be fully inserted.
5.  Refer all servicing to qualified service personnel. Service is required when the device has been damaged, including cord or plug damage, liquid has been spilled or objects have fallen into the device, the device has been exposed to rain or moisture, does not operate normally, or has been dropped.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE.

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