Grado offers a 15 foot (450cm) extension cable terminated with a 1/4 inch (6.3mm) plug and a 1/4 inch (6.3mm) jack. This cable is constructed from the same high quality wire as their headphone cable. For longer lengths, the cable may be...
expand review piggybacked up to 3 cables. Grado's website "guarantees no degradation of sonic quality with Grado headphones" while using their extension cable. -the mgmnt
Grado offers a Y adaptor cable that will allow the listening of two headphones from one headphone output. The cable has a 1/4-inch (6.3mm) plug to twin 1/4-inch (6.3mm) jacks. The 8 inches (20cm) of cable, between the plug and jacks, eliminates...
expand review added leverage on the output circuit board of the source. The Y adaptor cable is constructed of the same high quality wire as their headphone cable. Grado's website guarantees "no degradation of sonic quality with Grado headphones" while using their Y adaptor cable. -the mgmnt
Grado offers a mini adaptor cable that converts a 1/4 inch (6.3mm) plug to 1/8 inch (3.5mm) plug. The mini adaptor cable has a 1/8 inch (3.5mm) plug then 8 inches (20cm) of cable connected to a 1/4 inch (6.3mm) jack. The...
expand review 8 inches (20cm) of cable eliminates added leverage on the output circuit board of the source. The mini adaptor cable is constructed of the same high quality wire as their headphone cable. Grado's website guarantees "no degradation of sonic quality with Grado headphones" while using their mini adaptor cable. -the mgmnt
The new Grado Phono Preamp, model PH-1, represents the most successful solution to one of the most complex technical challenges in the field of audio that Grado Labs has ever tackled. It can be compared to the undertaking of designing our highly...
expand review acclaimed phono cartridges, headphones and our world renowned RA-1 headphone amplifier over the past several years. Our design goals were for a truly superb sounding phono preamp to work equally well with both low and high output cartridges with negligible noise. We wanted a phono preamp with ultra wide band pass, high overload, virtually perfect RIAA amplitude and phase coherency, and very low output impedance. This was the challenge set forth! This we have accomplished! We realized immediately that a challenge like this was not going to be met by using either of the time-honored methods of passive or active equalization circuits. The relative advantages and disadvantages of these old methods are very well known: the passive preamp approach is characterized by problems of first stage headroom and second stage noise. This is due to the 40dB high frequency insertion-loss of the passive network itself. Phono stage gain is frequency dependent with the result of too little feedback at the low end and too much at the high end. Of course, both extremes are sonically non-optimum and unacceptable. The more commonly used active equalization stage provides solutions to the classic passive circuit problems, but it also comes with a whole new set of its own problems. These difficulties arise out of the subtle ramifications of the classic negative feedback theory. The RIAA characteristic requires that the amplifier's closed-loop gain needs to change by a hundred to one (40dB) over the entire audio range. This means too little feedback-closure at low frequencies and too much at high frequencies. Too little causes inadequate suppression of simple distortions, and too much causes the generation of complex distortions (high-order). The new Grado phono preamp circuit design now has all of the advantages of the old methods, yet none of its antiquated disadvantages! The challenge was met! The processing problem has been split into two separate parts: a forward propagating signal current and a back propagating error voltage. We have indeed eliminated all of the past methods. Our new phono equalization technique is a derivative of the principals that we used in our highly regarded RA-1 headphone amplifier. In this design, feedback closure ratio does not change with frequency, but the total output gain does. Virtually all latter stage noise disappears! The output impedance is very low, with the EQ stage opened-loop and the closed-loop gain being the same. The best of both worlds What is so significant about these new innovations is the fact that the technical superiority claims absolutely correlate to an unprecedented improvement in openness, greater depth of field and increased definition to the sound of each musical instrument. The PH-1 offers a true freedom from past sonic problems along with Grado's usual warm, smooth, full bodied, non-fatiguing and rich sound qualities that everyone has embraced. If your turntable is driven with a Grado cartridge then you deserve to go the final step with the new PH-1 phono preamp. -the mgmnt
After years of relying on other equipment to drive Grado headphones, you can now listen and enjoy headphones through our new Grado Reference Headphone Amp, the RA1. Designed for state-of-the-art performance and specifically to play Grados, the new RA1 will allow you...
expand review to hear your headphones like never before. This new amp is machined from a solid block of mahogany and measures 5" wide, 5 1/2" deep and 1 1/2" tall and weighs in at 12 oz. The RA1 is available in an AC version or can be powered by two 9-Volt batteries that will drive the amp for 40 to 50 hours of listening pleasure. And the sound? Just like all Grados: warm, smooth, full-bodied, non-fatiguing and rich. Hook it up to any line source (portable or in-home) and drive your Grado headphones to their full potential. -the mgmnt
After years of relying on other equipment to drive Grado headphones, you can now listen and enjoy headphones through our new Grado Reference Headphone Amp, the RA1. Designed for state-of-the-art performance and specifically to play Grados, the new RA1 will allow you...
expand review to hear your headphones like never before. This new amp is machined from a solid block of mahogany and measures 5" wide, 5 1/2" deep and 1 1/2" tall and weighs in at 12 oz. The RA1 is available in an AC version or can be powered by two 9-Volt batteries that will drive the amp for 40 to 50 hours of listening pleasure. And the sound? Just like all Grados: warm, smooth, full-bodied, non-fatiguing and rich. Hook it up to any line source (portable or in-home) and drive your Grado headphones to their full potential. -the mgmnt
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