Jensen Transformers SP-2SX Stereo Speaker to Line Audio Converter

ISO-MAX®

Jensen Transformers SP-2SX ISO-MAX Stereo Speaker to Line Audio converter

Jensen Transformers
SP-2SX Stereo Speaker to Line Audio converter is a unique product that provides an elegant way to convert speaker-level audio to line-level audio.

Handy DIP switches make it easy to select input power ranges from 25 watts to 750 watts, making the SP-2SX compatible with a wide range of audio amplifiers.

This two channel "speaker" level to unbalanced "pro" level converter and ground isolator is designed to accept, in four switch selectable ranges, speaker drive voltages of 14 Vrms, 25 Vrms, 44 Vrms, or 77 Vrms. These voltages will be developed at full output of power amplifiers rated at 24 W, 75 W, 240 W, or 750 W, respectively, into 8 Ω loads or rated at 48 W, 150 W, 480 W, or 1,500 W respectively into 4 Ω loads. Input ranges also include 25 V and 70 V lines used in commercial sound systems covering large areas.

Since the speaker inputs are ungrounded, they are especially useful with power amplifiers where both outputs are actively driven and cannot be grounded (these are often referred to as "bridge-mode" or "floating" outputs). The speaker inputs represent a trivial additional load for the driving power amplifiers - maximum input power is 0.08 W, 0.4 W, 1.5 W, and 5.4 W respectively in the four input ranges. In addition, all models provide inherent low-pass filtering to remove ultra-sonic switching artifacts from the outputs of "digital" or "class D" power amplifiers. These artifacts can cause subtle distortions in downstream amplifiers [Deane Jensen and Gary Sokolich, "Spectral Contamination Measurement," AES 85th Convention Preprint 2725,1988}.

The standard versions have dual, or "stereo," outputs that correspond independently to each of the speaker input signals. The SP-2SX output signals will reach 6.9 Vrms (+19 dBu), a level that represents 15 dB of "headroom" in professional audio systems where the nominal or "reference level" signal is standardized at +4 dBu or 1.23 Vrms. "Mono" output versions, denoted by a " - M " suffix in the model number, have a single output that represents the sum of the two speaker input signals. These would be used, for example, when the inputs are Left and Right channels and the output, L + R, drives a single sub-woofer.

The configuration pictured here has Neutrik speakON inputs and XLR outputs, although terminal strips and RCA connectors are also available upon request. This audiophile-grade Stereo Speaker to Line converter is a completely passive device, so there is no chance of raising the noise floor of your audio system as might be the case with an active device.

The SP-2SX is an ideal solution for deriving sub-woofer inputs in pure stereo audio systems that do not normally provide subwoofer outputs. Channel-summing (mono output) models are available as well, opening a whole new range of possibilities.

The SP-2SXis housed in a sturdy metal enclosure, measuring 7.0" W x 3.5" D x 1.6" H., including the flanges. The flanges have mounting holes, which are handy for permanent installations.

At this point we typically like to remind customers not to confuse the SP-2SX with similar (but inferior) products from other manufacturers, but in this case, we know of no similar products, so even more than usual, the SP-2SX really is in a class of its own.

With inferior products coming from all over the world, we think it is a genuine treasure to find a company like Jensen Transformers, actually designing and manufacturing some of the finest products in the world, right here in the USA, and we are proud to be able to offer their products. The SP-2SX is made in the USA, is backed by the manufacturer's comprehensive one-year warranty, and has a remarkable 20-year warranty on the transformer device itself.

Please search for Cable Solutions "Jensen Transformers ISO-MAX Product Application Guide" for information on the other members of the ISO-MAX family.

Jensen Transformers' Description

ISO-MAX^® Model SP-2SX

2-Chan [stereo] speaker to line level converter

The Iso•Max SP-2SX is a two channel speaker to line level converter that lets you convert the high power signal from an audio amplifier output to a +4 dB (nominal) balanced line level for further processing or signal distribution.

Converts any speaker or amplifier output to line level
Delivers exceptionally low distortion down to 20 Hz
Ruler flat frequency response from 5 Hz to 20 kHz
Plug and play easy to use, no power required

The design begins with a rugged flanged enclosure that comes standard with gold plated XLRs and a removable screw-down barrier strip for easy installation in NEMA enclosures and 19” racks. Plug and play easy to use, this passive interface does not require any power to work. Inside are two Jensen high performance transformers that isolate the output to eliminate hum and buzz caused by ground loops while they eliminate issues with ‘bridged’ and ‘class D‘ power amp outputs. A series of input pad DIP switches let you select the range to suit various power amps for at 25 W, 75 W, 250 W, or 750 W max in to 8 ?. All types of amplifiers may be used including 25 V and 70 V line driver types.

Once connected, the SP-2SX is able to withstand signal levels to +19 dBu at 20 Hz without introducing distortion, phase shift or artifact of any kind. This opens the door to expand existing systems without having to run additional line level signals throughout a facility.

Features

Flat response from 5 Hz to 20 kHz and low phase distortion for improved transients and imaging
Transformer-isolated design eliminates issues with "Bridged" and "Class D" power amp outputs
DIP-switch selected ranges for power amps rated at 25 W, 75 W, 250 W, or 750 W into 8 Q
Input ranges include 25 V and 70 V line applications
Entirely passive - requires no power supply
Available as shown here with professional (XLR) output model SP-2SX with Neutrik SpeakON® input connections, or as consumer (RCA) output model SC-2NR with screw-strip input connections.
Channel-summing (mono output) versions of both available [available by special order only] - ideal for derived sub-woofer input

Jensen Transformers SP-2SX ISO-MAX Stereo Speaker to Line converter, front-right view

Another angle.

Jensen Transformers SP-2SX ISO-MAX Stereo Speaker to Line converter Connection Exampleshowing two amps in series

This connection example illustrates how the SP-2SX might be used to connect two amplifiers in series. The audio system can be expanded to feed extra power to additional to speakers to an adjacent room that may already be wired up. Use the SP-2SX to tap the signal from an existing amplifier to feed a second system.

Jensen Transformers SP-2SX ISO-MAX Stereo Speaker to Line Converter Connection Example showing powered monitors

As shown in this illustration, the SP-2SX lets you take the speaker output from a wedge monitor and feed it to a set of powered monitors for the drummer or side fills. Simply connect into the SP-2SX, set the power level and it will deliver a distortion-free line level signal.

Jensen Transformers SP-2SX ISO-MAX Stereo Speaker to Line converter Data Sheet, PDF

SP-2SX Data Sheet and Specifications. PDF format.

Dear eBay customer, eBay has made it impossible to include PDF documents in item descriptions, so if you want to see this one, you will need to refer to our website, eBay has also made it impossible to provide outside links, but we are not hard to find: https://www.ebay.com/usr/cable_solutions_one?

Jensen Transformers SP-2SX ISO-MAX Stereo Speaker to Line converter Manual, PDF

This is the User Manual, in PDF format.

Jensen Transformers Authorized Reseller Seal

Why Cable Solutions?

Cable Solutions is an Authorized Jensen Transformers Distributor, so our customers are ensured full warranty protection and technical support. (Jensen Transformers is obligated to provide neither warranty nor technical support for products purchased from unauthorized resellers!)
We stock this item locally so that it will be ready for immediate shipment, and no one works harder than we do to get your order shipped out to you fast! On business days, orders that are funded by noon will ship the same day. Orders funded on weekends or holidays will ship the next business day.
Customer service is our first priority. We do our best to help you find the best solutions for your particular application. We're enthusiasts too, so we know what it's like to wait for cables and accessories that are needed to hook up new gear. We also know how important it is to be able to get a response when you need help, so you'll often find us working long hours in an effort to get you the answers that you need.
If you have had enough of outsourced support or worse yet, companies that do not even publish a phone number or a functional email address, we think you will be absolutely delighted that you found our company. We know how important it is to be able to get help when you need it. That's why we have people, right here in Texas, ready to respond to your email or answer your phone call. If English is your language of choice, you will have the simple pleasure of communicating with people whose first language is English. Granted, if you call on the phone, you may detect more than a trace of a Texas accent, but that is to be expected when dealing with a family-owned business run by native Texans. We sincerely hope that you will find our heritage of courtesy, honesty, and an ethical way of doing business to be a refreshing experience.

Design excellence, high quality materials, meticulous workmanship, and superior service...put it all together and you get a superior product. Don't get stuck with bad advice, poor service, slow shipment or an inferior product. If you want the best, here it is.

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Warranty

Manufacturer's Warranty Statement

For a period of 1 YEAR after purchase, Jensen Transformers, Inc. will, free of charge, repair or replace any part of an ISOMAX® product that fails due to defective materials or workmanship.

For a period of 20 YEARS after purchase, Jensen Transformers, Inc. will, free of charge, repair or replace any Jensen OEM transformer or any Jensen transformer contained in an ISOMAX® product that fails due to defective materials or workmanship.

Both limited warranties are subject to the following limitations:

1. Defects that are, in the sole judgment of Jensen, the result of accident, misuse, abuse, neglect, mishandling, misapplication, faulty installation, unauthorized repair, modification, or acts of God will not be covered by this warranty.

2. In the absence of proof of date of purchase, the date of manufacture (as determined from lot numbers of internal parts and the records of Jensen Transformers, Inc.) shall be used in its place.

3. There are no express warranties except as listed above.

4. JENSEN TRANSFORMERS, INC. SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THIS PRODUCT OR ARISING OUT OF THE BREACH OF THIS WARRANTY. Duration of implied warranties, if any, is limited to 12 months.

If a problem develops with this product during the warranty period, call or write us before attempting any repair. We can help you identify specific problems, and possibly solve the problem, before the unit is returned to us for repair or replacement. In any case, DO NOT RETURN THE UNIT WITHOUT AUTHORIZATION and instructions from us. Jensen cannot be responsible for damage due to shipping or improper packaging.

Warranty Assistance

USA Customers

Jensen Transformers typically does a very fine job of handling warranty issues, but if you prefer to deal with Cable Solutions, we will be pleased to handle the matter for you.

International Customers

Please notice that most of our electronic equipment carries a USA warranty, so all international warranty issues must be handled by Cable Solutions. This means that you must return the item to Cable Solutions for all warranty repair or replacement issues. You will be responsible for all shipping/handling expenses.

All Customers

Return Merchandise Authorization (RMA) is required for all returns handled by Cable Solutions. Please contact us for authorization and instructions.

Return Policy

eBay-Managed Returns

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The following information applies only to items that are not governed by the eBay-managed return process:

Defective Merchandise

Defective merchandise will be repaired or replaced as described above.

Non-defective Merchandise

All non-defective returns are subject to restocking fees. Here are some examples of the fees:

Un-opened merchandise

All un-opened returns are subject to a 10% (minimum) restocking fee.

Opened merchandise

B-Stock or "open box" electronic devices - 15% (minimum)

New electronic devices - 20% (minimum)

Manufactured cables that are packaged in a reusable container - 15% (minimum)

Manufactured cables that are packaged in a non-reusable container - 20% (minimum)

Shipping/handling fees are not refundable and you will be responsible for all shipping/handling expenses related to the return. In the case of items with "free shipping", customary shipping/handling fees will be added to your restocking fees.

In order to qualify for the rates shown above, we must receive your return within the first 14 days following the day you receive your order. In cases where the item is returned incomplete, or in less than perfect condition, we will evaluate the restocking fees on a case by case basis.

Return Merchandise Authorization (RMA) is required for all returns. Please contact us for authorization and instructions.