Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

Pros: Clean audio output favorably comparable to Sony’s similar product.

Cons: The neutral case color may still contrast with the interior of your vehicle. And depending on where you buy it, Sony’s similar Cassette Adapter may be cheaper.

Over the last several years, one company rapidly became synonymous with premium-priced, bling bling audio and video accessories – the sorts of parts people would find connecting their brand new home theater components when they told a Best Buy or Circuit City salesperson to spare no expense. Whether it was $59.95 for Monster Cable’s gold-tipped Xbox cables when Microsoft’s reference version sold for $19.95, or $49.95 for “gas-injected dielectric” FireWire cables that could be had for $3.99 as no-frills generics, we’ll admit to having been somewhat skeptical of the premium products based on their prices alone in the past.

But we’ve recently had the opportunity to put a number of Monster’s iPod accessories through their paces, and we were pleasantly surprised by a number of them. Many of the products compared favorably in price with other companies’ accessories, and worked at least as well. The results below speak for themselves. Updated 6-14-07: Monster has introduced an updated version of the iCarPlay Cassette Adapter that’s also compatible with Apple’s iPhone. Pictures are shown at the bottom of this review, which was originally posted on May 13, 2004.

Enter the iCarPlay

In addition to car chargers and cables, Monster sells an in-car Cassette Adapter called the iCarPlay – a grey audio-cassette shaped device that plugs into a vehicle’s cassette tape deck and connects via a black 3.5-foot audio cable to one of two output sources. The iPod’s headphone jack can be used as the output source, but audiophiles generally prefer to jack in to the iPod’s line-quality Dock Connector output by way of an adapter. (This can be accomplished easily using Monster’s Ultra-Low Profile Charger, Belkin’s iPod Auto Kit, or SiK’s imp car charger.)

Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

We compared Monster’s Cassette Adapter with two physically similar offerings – one was a cheaper ($9.95) Coby-brand Cassette Adapter (black-colored), and the other was a Sony-brand CPA-9C Cassette Adapter that varies in price (also black-colored), our prior favorite. Monster’s product outperformed Coby’s adapter and tied Sony’s in performance, displaying relatively little audio distortion even when pushing the test car’s audio system. While Cassette Adapter solutions as a product category are not likely to match the crystalline performance of vehicles with in-dash auxiliary ports or more expensive head unit modifications such as Dension’s ICELink, Monster’s is currently as good as it gets for an inexpensive part.

Only Small Question Marks

Our only reservations with the Cassette Adapter are modest ones. First, like Belkin’s Mobile Cassette Adapter ($24.99), Monster’s choice of a grey color for its cassette molding contrasts with both most companies’ black adapters, and standard iPod white. When sucked inside of our tape deck, it left a small grey slice visible that Sony’s adapter, for example, did not, and whether this matters to you will of course depend on personal taste and the color of your vehicle’s interior. We wish Monster had kept the cassette molding black, like both the attached cable and its charger peripherals, to unify the theme.

Second, Monster’s Adapter sells for $19.95 virtually everywhere, which is surely $10 better spent than on Coby’s product. But prices on Sony’s Adapter vary from store to store, infrequently as low as $9.95 or $10.95, most commonly $17.95 to $19.99 at bricks-and-mortar retailers. At the same price, Monster and Sony adapters are evenly matched, but where the Sony’s sold at a discount, it has the edge.


Years ago, Monster might have priced itself out of even the iPod’s higher-than-average-bracket market, but its offerings are close in price to its competitors: we couldn’t recommend the $9.95 Coby Adapter, but at $19.95, the iCarPlay is comparable with Sony’s Adapter, depending on where you shop. If you’re in need of an cassette adapter in a rush and the iCarPlay’s available in a store near you, we wouldn’t hesitate to recommend it – but if you’re not in a rush, want to save a few dollars, and can afford to hunt around a bit, Sony’s CPA-9C might be a cheaper alternative.

iCarPlay Cassette Adapter for iPod & iPhone

In June, 2007, Monster Cable unveiled a modestly updated version of the iCarPlay Cassette Adapter that is compatible with both the iPod and iPhone. It is confirmed to properly fit the iPhone’s recessed, small headphone port; however, our review unit made a noticeable grinding noise when in our car’s stereo, which resulted in a drop in our rating of this version to a B-.


Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

Review: Monster iCarPlay Cassette Adapter for iPod/iPhone

Table of Contents

Our Rating


Pre-iPhone-Compatible Version (2007)

Limited Recommendation

iPhone-Compatible Version (2007)

Company and Price

Company: Monster Cable


Model: iCarPlay Cassette Adapter

Price: $19.95

Compatible: All iPods, iPhone

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