Focal Impulse 4.320 ISO IY-AC connector Ultra-compact 4-channel amplifier - 4 x 55 Wrms Y-adapter cable in ISO format (1m)

Review Focal Impulse 4.320 ISO IY-AC connector

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Focal Impulse 4.320 ISO IY-AC connector

Name: Focal Impulse 4.320 ISO IY-AC connector
Brand: Focal
SKU: AR201610110072
Price: 179.95 EUR
Availability: InStock
Rating: 9 (11 reviews)

Ultra-compact 4-channel amplifier - 4 x 55 Wrms Y-adapter cable in ISO format (1m)

11 customer reviews

179€⁹⁵

Pay in 3

3 x 61€98

of which 5€99 fees

Maximum quantity allowed is 100

179€⁹⁵

Logistics information

Overview

The complete kit for your audio installation

The Focal Impulse 4.320 is a 4-channel digital micro amp with 4 x 55 Watts to give you the best performance. It will delight you with its easy handling and simplified installation.

The Focal IY-AC ISO connector adapter cable accompanies your Impulse 4.320 amplifier and offers a very easy installation thanks to the Plug and Play system. It does not require any modification of the original system.

Efficient technology and easy installation

The Impulse 4.320 uses technology derived from the Performance Series FD amplifiers. With an efficiency of over 90%, Class D offers many advantages: low heat build-up, low power consumption, low distortion at high volumes, compact size. The amplifier thus achieves an unequalled size/power ratio. It develops 4x55 or 2x160 Watts RMS under 4 Ohms. Comfortable power, fast attack for a realistic and more airy sound, it will transform the listening of your front and rear speakers.

With dimensions of only 17.65x4.6x6.7cm, the Impulse 4.320 can be easily hidden in the dashboard or centre console. Featuring both high level (with auto-detect) and low level inputs, it is compatible with all car radios. Supplied with brackets, adapters to take the speaker outputs from a car radio, RCA adapters for aftermarket car radios and a power connector, the amp is designed for easy installation. It does not require direct battery power.

Very flexible in use

To accommodate different car radios, this amplifier has a 2 or 4 channel input selector. It is primarily designed to drive the front and rear speakers. However, it can also be used in 3 or 2 channel mode, to meet all the enhancement needs of a small installation.

Each pair of channels incorporates an active crossover to perfectly match the sound response to the speakers in use. The front channels can be operated at full bandwidth or cut high-pass at 75 Hz when using small diameter speakers. By avoiding low frequencies on a small diameter speaker, the listening experience becomes sharper. The rear channels are equipped with an active crossover and progressive phase adjustment to handle a small subwoofer or full range speakers of different diameters.

Main features :

Impulse 4.320

4-channel amplifier
Easy integration into the dashboard
Compatible with all car radios
Highly flexible in use
AEC power (4 Ohms): 4 x 55 Wrms
Bandwidth: 10 Hz / 20 kHz
ISO compatible
Weight: 550 g
Dimensions: 175 x 66.5 x 47 mm

ISO IY-AC connector

Length: 1 m
ISO compatible
Easy installation Plug & Play
Direct connection of the Impulse 4.320 to your original car radio

Logistics information : This product is not available for delivery in the following locations: Belgium, Luxembourg, Switzerland.

Specifications

Select your criteria

General information	Product name	Focal Impulse 4.320 ISO IY-AC connector
	Brand	Focal Focal
	Model	FOCAL IMPULSE 4.320 - + CONNECTEUR ISO
Main characteristics	Product type	Amplifier
Amplification	Power	220 W
Amplification	Number of channels	4
Warranties	Commercial warranty	Seller 2 years
Warranties	Legal warranty	See terms & conditions
Safety Information	Responsible person	FOCAL JMLab
	Postal address	FOCAL JMLab, BP3774, 42353 La Talaudière cedex
	Electronic Address	bareg@focal-naim.com

See all Focal products

See Focal Car amplifier section

Product referenced on 12 Oct 2016

Customer reviews

Global rating

9/10

based on 11 reviews Editorial and moderation guide

82%
9 reviews
9%
1 review
0%
9%
1 review
0%

by ThierryT
Posted on 19 May 2025

Bought on 27 Apr 2025 from LDLC

Number of reviews: 1 Average rating: 10

Excellent

I wanted to give my Kenwood post a bit of a boost. I think I made the right choice. I wanted a bit more sound without having to pull wires. The ISO connector is very practical, I just inverted the red most battery with the yellow most permanent so that my set retains its settings and radios.
The sound is loud enough for me but much richer when I only had my radio.
The bass is present but it's not like with a subwoofer.
The midrange and treble, once adjusted, are of good quality.
If you set the gain correctly, the sound is quite loud and clear when you turn up the volume.
I really enjoy listening to my music, I've found what I'm looking for.
If you're addicted to very loud sound and boom-boom, this little amp isn't for you.
For all the others who want to improve their sound without any headaches, you can go for it with your eyes closed.

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by OlivierP
Posted on 13 Jun 2024

Bought on 6 May 2024 from LDLC

Number of reviews: 1 Average rating: 10

perfect installation

the iso iy-ac connector is great for a direct connection to my 2006 laguna and this little plug does the job well and is small enough to be installed anywhere. I recommend this kit to improve your audio system.

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by JorgeR
Posted on 6 Jun 2024

Bought on 1 Jun 2024 from LDLC

Number of reviews: 1 Average rating: 10

Focal amplifier

Great product, you can immediately see the difference in sound with the original car radio in my vehicle.
I would recommend it.

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by XavierD
Posted on 13 May 2024

Bought on 14 Apr 2024 from LDLC

Number of reviews: 1 Average rating: 10

Good product

It hides perfectly behind the car radio and works very well for its small size.
Easy to connect using the ISO connector

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by AnthonyR
Posted on 7 Jun 2023

Bought on 4 Jun 2023 from LDLC

Number of reviews: 1 Average rating: 10

very good product

easy to install with my original car radio (just add its "Focal PSA Y-ISO Harnes", if you have a Peugeot after 2017)
power gain coupled with "FOCAL INSIDE IS PSA 165".
I recommend it for sound buffs
the system was installed in a Peugeot expert from 2017 with door isolation

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