Menu
- Thomann is the largest online and mail order retailer for musical instruments, light and sound equipment worldwide, having about 10m customers in 120 countries and 80,000 products on offer. We are musicians ourselves and share your passion for making it. As a company, we have a single objective: making you, our customer, happy.
  
  +49(0)9546 9223-55
  
  international@thomann.de
- We have a wide variety of pages giving information and enabling you to contact us before and after your purchase. Alternatively, please feel free to use our accounts on social media such as Facebook or Twitter to get in touch.
  
  +49(0)9456 9223-55
  
  international@thomann.de
- Most members of our service staff are musicians themselves, which puts them in the perfect position to help you with everything from your choice of instruments to maintenance and repair issues.
  
  +49(0)9546 9223-476
  
  sc.cc@thomann.de
- Our expert departments and workshops allow us to offer you professional advice and rapid maintenance and repair services. This also affects the price - to our customers' benefit, of course.
  
  +49(0)9546 9223-476
  
  sc.cc@thomann.de
- Apart from the shop, you can discover a wide variety of additional things - forums, apps, blogs, and much more. Always with customised added value for musicians.
Close
Service
Contact us
Help

Customer centre

Wish List

Compare Products

Delete all

Radial Engineering Twin-Iso

10 ratings

2-Channel Line Transformer

For eliminating ground loops
2x XLR in/out
Switchable ground/lift
Switchable Polarity Reverse 180°
Especially suitable to eliminating sub-mixers

Further Information

Multi-Channel Unit	Yes
Active / Passive	Passive
19"	No
Pad switchable	No
Gnd/Lift switchable	Yes
Powered by battery	No
Speaker Simulation	No

10 Customer Ratings

5

8 Customers

8 customers have given this product a 5-star rating.

Of these, 7 customers have written no texts or given their feedback in another language.
4

1 Customer

One customer has given this product a 4-star rating.
3
2

1 Customer

One customer has given this product a 2-star rating.

No customer has written a text about this; or they have written a text in a different language.
1

4.6 /5

features
sound
quality

Twin Iso. It works.

Christopher2751, 18.12.2014

I was considering buying one of these isolating boxes for quite a while before I finally plucked up the courage to spend the cash. I needed to isolate my balanced audio interface from my unbalanced power amp because I was picking up some awful ground loop buzzing in my speakers.
It's certainly not cheap but like all Radial products the Twin-Iso is built like a tank and could probably be run over by a car or dropped out of a window and it would be fine. All Radial products I've had have been made to the highest standards, and this is no exception.
For a long time the Twin Iso had Jensen transformers inside. Jensen have made arguably the best transformers in the world for decades, and considering Transformer Isolating boxes are basically just transformers in a box, the transformers have a big impact on the sound (in fact the ONLY thing that has an impact on the sound).
Recently Radial bought the Jensen company and then I noticed the Jensen name disappear from the Twin Iso product description. It was hard to get a straight answer about what exactly that meant for the product, but I went ahead and bought one anyway. I was a little aggrieved when I finally bought the Twin Iso to find Radial's own transformer inside rather than the very well respected Jensen isolating JT-11 series transformer, which was previously used in the Twin-Iso.
Now I guess the question is whether there is any difference in sound quality between these 2 transformers.. The Radial Twin Iso DOES sound very good and as a way to isolate two pieces of equipment without changing the sound it works very well indeed and it made my amplifier silent from all buzzes and interferences that had previously plagued my monitoring setup. There is also no noticeable loss in audio quality when it's used. That being said it still feels a bit cheeky to sell a product for the same amount when it previously used 2 world renowned £100 a piece transformers and now it uses their own in-house made transformers that have no track record, history or documented uses.
So although I would have preferred Jensen transformers inside, it is probably doubtful that any difference in sound quality could actually be heard. The specs for the Radial transformers are in fact very good and Radial have actually been making transformers for a few years now so I'm sure the transformers are of the highest quality (they better be for this price!). I still wouldn't hesitate to recommend this product to anyone who cares about sound quality and needs to isolate two pieces of equipment from each other, just don't expect to find Jensen's inside, if that even matters to you.

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

Does what it has to

unLaXo, 13.12.2017

For separating line signal (+4dB)
Passive device
Rugged Precise - you don't even know that you have this in chain.
It does what it has to. Great device if you need it go for it.

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

Original review (Show translation)

Unfortunately there was an error. Please try again later.

Heel heel goed

Tyne, 10.03.2019

Niet goedkoop, maar dit doet absoluut wat het moet doen, zonder het minste kwaliteitsverlies van geluid.
Schitterend!

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

299 €

All prices incl. VAT

Available immediately

Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times

Delivery free of charge expected between Thursday, 4.03. and Friday, 5.03.

Add to wish list

sales rank in this product group	98
at thomann.de	33451

item number	208037
sales unit	1 piece
available since	July 2008

Total Rating
features
sound
quality

Show all

Recording E-Guitars

Our aim is to explain the basic process of recording the electric guitar!

Show all

DI Boxes

While we could go into more and more detail about DI boxes and their inner workings, at some stage its best to get some hands-on experience!

Show all

Manual

PDF

Smart Navigator

Current product

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

* The prices shown include VAT. and are valid as long as stocks last. Please click here for international shipping rates. We do not accept liability for typographical errors or inaccurate information of any kind. All invoices will be issued in EUR.

Roland FP-30X BK

Roland FP-30X BK; Digital Piano; 88 keys PHA-4 keybed with Ivory Feel; Sound engine: 12 SuperNATURAL Piano tones, 20 E-Piano tones and 24 other tones; max. polyphony: 256 voices; Bluetooth Audio (V3.0) and Bluetooth MIDI (V4.0); build-in speaker system (two...

Rode VXLR Pro

Rode VXLR Pro; Plug adaptor with transformer and power converter; TRS mini jack (3.5mm) to XLR3M; integrated voltage converter from phantom power (12 - 48V) to plug-in power (4V); for connecting VideoMic, VideoMic GO, VideoMicro, VideoMic Pro, VideoMic Pro+, VideoMic...

(1)

Dante AVIO Bluetooth IO Adapter 2x1

Bluetooth Adapter For the connection of a computer, tablet or smartphone to a Dante network via Bluetooth, Ideal for recording or playing back a stereo signal, Robust housing, Fully-functional Dante interface, Transmits 2 inputs and 2 outputs with 48...

Zoom PodTrak P8

Podcasting Recorder Colour LCD touch screen, 6 Microphone inputs with XLR connections and optional phantom power, 6 Headphone outputs with individual volume controls: 3.5 mm stereo jack, Gain control per input, Mute button and "ON AIR" indicator, Independent channel...

Elation KL Fresnel 150W 6" CW

Elation KL Fresnel 150 W 6" CW; LED Fresnel spotlight incl. barn door and colour filter frame; infinitely variable manual zoom from 15° to 38°; homogeneous 16-bit dimming; dimmer mode, dimmer curve and dimmer delay can be adjusted according to...

Behringer MO240

Behringer MO240 - In-Ear Monitoring Earphones; 1x dynamic and 1x balanced armature; Impedance: 32 Ohms; Frequency response: 20 Hz - 20 kHz; max. SPL 102 dB; cable length: 1.5 m; 3.5 mm stereo jack; colour: black; incl. gold plated 6.3...

Zaor Miza 88 Flex Wengé Grey

Zaor Miza 88 Flex Wengé Grey; studio desk with 19" rack and keyboard tray; offers space for computer monitors (2 x 30"), keyboard, mouse, DAW controller, monitor controller etc.; 2x 4U 19" racks and central drawer; extendable tray, height adjustable...

(2)

Tascam MiNiSTUDIO Creator US-42B

USB 2.0 Audio Interface For personal broadcasting, podcasting, live gaming, film dubbing and other applications, 24Bit / 96kHz Audio converter, 2 x XLR / jack combo input sockets with switchable + 48V phantom power for condenser microphones, 2 High...

(1)

Boss BCB-90X Pedalboard

Boss BCB-90X Pedal Board; Next-generation BCB-series pedalboard, updated for modern pedal setups; Customizable high-density foam insert accommodates a variety of pedal sizes, including BOSS compacts, 200-/500-series pedals, and more; Light and rugged moulded design with space-saving footprint, integrated carrying handle,...

Roland FP-30X WH

Roland FP-30X WH; Digital Piano; 88 keys PHA-4 keybed with Ivory Feel; Sound engine: 12 SuperNATURAL Piano tones, 20 E-Piano tones and 24 other tones; max. polyphony: 256 voices; Bluetooth Audio (V3.0) and Bluetooth MIDI (V4.0); build-in speaker system (two...

EVO Start Recording Bundle

USB Audio Interface Recording Set Ideal for home recording, streaming, gaming and podcasting, Set consists of EVO 4 audio interface, SR1 large diaphragm condenser microphone, SR2000 over-ear headphones (closed), microphone spider and XLR cable, 2 In / 2 Out...

Zaor Miza M Flex Cherry Black

Zaor Miza M Flex Cherry Black; studio desk; solid and modern studio design with cable outlets and cable compartment in the back; extendable tray, height adjustable in 8 steps for devices up to 141cm width (e.g. keyboards, mixers etc.); dual...

Give Feedback

Feedback Found an error or want to give us feedback about this page?

We're looking forward to hearing from you and aim to solve any problems as soon as we can.

Radial Engineering Twin-Iso

2-Channel Line Transformer

Further Information

Related Products

Smart Navigator

Compare Similar Items