RDL TX-8A 4 and 8 Ohm Input Interface

RDL TX-8A 4 and 8 Ohm Input Interface

RDL TX-8A 4 and 8 Ohm Input Interface


Show MoreLess


Now Viewing:

In Stock
Order in the next 0:00:00 to ship today

Product Highlights

  • Transform Amplifier Output to Line Level
  • Bridges 4 and 8 Ω Speakers
  • Converts Levels from 0.5 W to 400 W
  • Bridge Input into Existing Amplifier
  • Can Feed a Subwoofer Amplifier Input
  • Detachable Terminal Block
  • Bifilar Winding Coils
  • Balanced or Unbalanced Output
  • Adjustable Input Power Voltage
  • Galvanic Isolation
Show moreShow less

B&H $500 Gift Card Dash

Share for a chance to win a $500 B&H Gift Card!

Share on Twitter

Share a favorite product for chances to win one of eight $500 B&H Gift Cards!
1 new winner announced every Monday starting Nov 5th!
Limit 1 entry per day: Come back every day to increase your chance of winning.

Be sure to mention #BHWishList when you share!

Congrats to our winners so far:

Next winner: Nov 19th

James Z. (Wk 1)

Ralph H. (Wk 2)

Official Rules


NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $500.00 Gift Card Dash (the "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about October 28, 2018 until on or about December 23, 2018 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share any product found on the B&H website (the "Website") on Facebook or Twitter via the dedicated links contained on the website using the hashtag #BHWishlist; or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment ) (optional) to: B&H $500.00 Gift Card Dash Sweepstakes, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total eight (8) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $500.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize at the email address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the email account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An email account holder shall mean the natural person assigned to such email account by the internet access or online service provider or other organization responsible for assigning email addresses for the domain associated with such email account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $500.00 Gift Card Dash Sweepstakes Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $500.00 Gift Card Dash Sweepstakes, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

Let us know how to reach you if you win!

Privacy 100% guaranteed; email address for contact purposes only


Already have a B&H account? Just log in tomorrow to enter again!

$0 VA Sales Tax Collected on This Item
Add to Wish List Item in Wish List

RDL TX-8A overview

  • 1Description

The RDL TX-8A 4 Ohm/8 Ohm Input Interface is a mono audio transformer that can convert the output of a 4 or 8 Ohm amplifier into a line level input to be sent to an audio mixer or second amplifier. The transformer's frequency response extends low enough to make it suitable for feeding a subwoofer amplifier input. For situations when interfacing between a stereo output to a subwoofer input, two TX-8A modules may be used, one from each side of the stereo output signal, with their inputs combined as the subwoofer input.

The front panel level control of the transformer allows you to adjust the input power voltage to -10 dBV or +4 dBu. The unit can handle between 0.5 and 400 W of operational power and can be wired to output either balanced or unbalanced signals.

For easy wiring, the unit features detachable terminal block connections. To couple the audio input to the audio output, the transformer features bifilar coil windings. To prevent ground loops, the device is built with galvanic isolation. For convenience, the transformer may be mounted on the sides of a rack or on the rack rails using RDL's optional TX mounting accessories.

UPC: 813721016294
Table of Contents
  • 1Description

RDL TX-8A specs

Input Connector 1 x Barrier block
Minimum Input Level For +4 dBu output: 8 W at 8 Ω or 16 W at 4 Ω
For -10 dBV output: 0.5 W at 8 Ω or 1 W at 4 Ω
Maximum Input Level 400 W
Attenuation 16 dB to 34 dB (input to output)
Output Connector 1 x Barrier block
Output Level -10 dBV unbalanced or +4 dBu balanced, adjustable (10 kΩ load)
Isolation Galvanic bifilar wound audio transformer
Frequency Response 20 to 20,000 Hz (± 0.75 dB)
THD <0.1% (1 kHz); <1% (20 to 20,000 Hz)
Power Requirement Passive
Dimensions (H x W x D) 3.0 x 1.2 x 1.5" (7.6 x 3.0 x 3.8 cm)
Weight 0.32 lb (145.15 g)
Packaging Info
Package Weight 0.4 lb
Box Dimensions (LxWxH) 4.1 x 2.1 x 2.0"

RDL TX-8A reviews

TX-8A 4 and 8 Ohm Input Interface is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Works Perfectly! I needed to connect a 40 year old Wurlitzer organ to the church sound system and with the TX-8A was able to do it with ease...love it!
Date published: 2013-01-25
  • y_2018, m_11, d_15, h_16
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.9
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_1
  • loc_en_US, sid_886181, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_bhphotovideo
Be the first to review this item


RDL TX-8A accessories

See any errors on this page? Let us know. exarxxqd